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## Current Electricity

### Physics

#### Previous Years Questions

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A $$1 \mathrm{~m}$$ long wire is broken into two unequal parts $$\mathrm{X}$$ and $$\mathrm{Y}$$. The $$\mathrm{X}$$ par...
JEE Main 2022 (Online) 29th July Evening Shift
Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R. Assertion A: Alloy...
JEE Main 2022 (Online) 29th July Evening Shift
Two metallic wires of identical dimensions are connected in series. If $$\sigma_{1}$$ and $$\sigma_{2}$$ are the conduct...
JEE Main 2022 (Online) 29th July Morning Shift
Given below are two statements : Statement I : A uniform wire of resistance $$80 \,\Omega$$ is cut into four equal parts...
JEE Main 2022 (Online) 28th July Evening Shift
A wire of resistance R1 is drawn out so that its length is increased by twice of its original length. The ratio of new r...
JEE Main 2022 (Online) 28th July Morning Shift
(A) The drift velocity of electrons decreases with the increase in the temperature of conductor. (B) The drift velocity ...
JEE Main 2022 (Online) 27th July Evening Shift
Two sources of equal emfs are connected in series. This combination is connected to an external resistance R. The intern...
JEE Main 2022 (Online) 27th July Morning Shift
A battery of $$6 \mathrm{~V}$$ is connected to the circuit as shown below. The current I drawn from the battery is : ...
JEE Main 2022 (Online) 26th July Evening Shift
The current I in the given circuit will be : ...
JEE Main 2022 (Online) 26th July Morning Shift
A current of 15 mA flows in the circuit as shown in figure. The value of potential difference between the points A and B...
JEE Main 2022 (Online) 25th July Evening Shift
Which of the following physical quantities have the same dimensions?
JEE Main 2022 (Online) 25th July Morning Shift
An electric cable of copper has just one wire of radius 9 mm. Its resistance is 14 $$\Omega$$. If this single copper wir...
JEE Main 2022 (Online) 30th June Morning Shift
Two identical cells each of emf 1.5 V are connected in parallel across a parallel combination of two resistors each of r...
JEE Main 2022 (Online) 24th June Morning Shift
What will be the most suitable combination of three resistors A = 2$$\Omega$$, B = 4$$\Omega$$, C = 6$$\Omega$$ so that ...
JEE Main 2022 (Online) 24th June Evening Shift
A teacher in his physics laboratory allotted an experiment to determine the resistance (G) of a galvanometer. Students t...
JEE Main 2022 (Online) 25th June Morning Shift
In the figure, a very large plane sheet of positive charge is shown. P1 and P2 are two points at distance l and 2l from ...
JEE Main 2022 (Online) 25th June Morning Shift
If n represents the actual number of deflections in a converted galvanometer of resistance G and shunt resistance S. The...
JEE Main 2022 (Online) 25th June Evening Shift
Two cells of same emf but different internal resistances r1 and r2 are connected in series with a resistance R. The valu...
JEE Main 2022 (Online) 25th June Evening Shift
The equivalent resistance between points A and B in the given network is : ...
JEE Main 2022 (Online) 26th June Evening Shift
An aluminium wire is stretched to make its length, 0.4% larger. The percentage change in resistance is :
JEE Main 2022 (Online) 26th June Morning Shift
A 72 $$\Omega$$ galvanometer is shunted by a resistance of 8 $$\Omega$$. The percentage of the total current which passe...
JEE Main 2022 (Online) 27th June Morning Shift
Two long parallel conductors S1 and S2 are separated by a distance 10 cm and carrying currents of 4A and 2A respectively...
JEE Main 2022 (Online) 27th June Evening Shift
Resistance of the wire is measured as 2 $$\Omega$$ and 3 $$\Omega$$ at 10$$^\circ$$C and 30$$^\circ$$C respectively. Tem...
JEE Main 2022 (Online) 28th June Evening Shift
The combination of two identical cells, whether connected in series or parallel combination provides the same current th...
JEE Main 2022 (Online) 29th June Evening Shift
Two resistors R1 = (4 $$\pm$$ 0.8) $$\Omega$$ and R2 = (4 $$\pm$$ 0.4) $$\Omega$$ are connected in parallel. The equival...
JEE Main 2021 (Online) 1st September Evening Shift
Due to cold weather a 1 m water pipe of cross-sectional area 1 cm2 is filled with ice at $$-$$10$$^\circ$$C. Resistive h...
JEE Main 2021 (Online) 1st September Evening Shift
The equivalent resistance of the given circuit between the terminals A and B is :...
JEE Main 2021 (Online) 31st August Evening Shift
Consider a galvanometer shunted with 5$$\Omega$$ resistance and 2% of current passes through it. What is the resistance ...
JEE Main 2021 (Online) 31st August Morning Shift
For full scale deflection of total 50 divisions, 50 mV voltage is required in galvanometer. The resistance of galvanomet...
JEE Main 2021 (Online) 27th August Evening Shift
The Colour coding on a carbon resistor is shown in the given figure. The resistance value of the given resistor is :...
JEE Main 2021 (Online) 27th August Evening Shift
Five identical cells each of internal resistance 1$$\Omega$$ and emf 5V are connected in series and in parallel with an ...
JEE Main 2021 (Online) 27th August Morning Shift
An electric bulb of 500 watt at 100 volt is used in a circuit having a 200 V supply. Calculate the resistance R to be co...
JEE Main 2021 (Online) 26th August Evening Shift
If you are provided a set of resistances 2$$\Omega$$, 4$$\Omega$$, 6$$\Omega$$ and 8$$\Omega$$. Connect these resistance...
JEE Main 2021 (Online) 26th August Evening Shift
What equal length of an iron wire and a copper-nickel alloy wire, each of 2 mm diameter connected parallel to give an eq...
JEE Main 2021 (Online) 26th August Morning Shift
In the given figure, the emf of the cell is 2.2 V and if internal resistance is 0.6$$\Omega$$. Calculate the power dissi...
JEE Main 2021 (Online) 26th August Morning Shift
The resistance of a conductor at 15$$^\circ$$C is 16$$\Omega$$ and at 100$$^\circ$$C is 20$$\Omega$$. What will be the t...
JEE Main 2021 (Online) 27th July Evening Shift
A simple pendulum of mass 'm', length 'l' and charge '+ q' suspended in the electric field produced by two conducting pa...
JEE Main 2021 (Online) 27th July Evening Shift
In the given figure, a battery of emf E is connected across a conductor PQ of length 'l' and different area of cross-sec...
JEE Main 2021 (Online) 27th July Morning Shift
The given potentiometer has its wire of resistance 10$$\Omega$$. When the sliding contact is in the middle of the potent...
JEE Main 2021 (Online) 25th July Evening Shift
In the given potentiometer circuit arrangement, the balancing length AC is measured to be 250 cm. When the galvanometer ...
JEE Main 2021 (Online) 25th July Evening Shift
In the given figure, there is a circuit of potentiometer of length AB = 10 m. The resistance per unit length is 0.1 $$\O... JEE Main 2021 (Online) 25th July Morning Shift A Copper (Cu) rod of length 25 cm and cross-sectional area 3 mm2 is joined with a similar Aluminium (Al) rod as shown in... JEE Main 2021 (Online) 22th July Evening Shift The value of current in the 6$$\Omega$$resistance is :... JEE Main 2021 (Online) 20th July Morning Shift In the experiment of Ohm's law, a potential difference of 5.0 V is applied across the end of a conductor of length 10.0 ... JEE Main 2021 (Online) 18th March Morning Shift The four arms of a Wheatstone bridge have resistances as shown in the figure. A galvanometer of 15$$\Omega$$resistance ... JEE Main 2021 (Online) 17th March Evening Shift Two cells of emf 2E and E with internal resistance r1 and r2 respectively are connected in series to an external resisto... JEE Main 2021 (Online) 17th March Evening Shift A current of 10A exists in a wire of cross-sectional area of 5 mm2 with a drift velocity of 2$$\times$$10$$-$$3 ms$$-$... JEE Main 2021 (Online) 17th March Morning Shift A resistor develops 500 J of thermal energy in 20 s when a current of 1.5A is passed through it. If the current is incre... JEE Main 2021 (Online) 16th March Evening Shift A conducting wire of length 'l', area of cross-section A and electric resistivity $$\rho$$ is connected between the term... JEE Main 2021 (Online) 16th March Morning Shift A wire of 1$$\Omega$$ has a length of 1 m. It is stretched till its length increases by 25%. The percentage change in re... JEE Main 2021 (Online) 26th February Evening Shift Five equal resistances are connected in a network as shown in figure. The net resistance between the points A and B is :... JEE Main 2021 (Online) 26th February Morning Shift A cell E1 of emf 6V and internal resistance 2$$\Omega$$ is connected with another cell E2 of emf 4V and internal resista... JEE Main 2021 (Online) 24th February Morning Slot A current through a wire depends on time as i = $$\alpha$$0t + $$\beta$$t2where $$\alpha$$0 = 20 A/s and $$\beta$$ = 8 A... JEE Main 2021 (Online) 24th February Morning Slot In the figure shown, the current in the 10 V battery is close to : ... JEE Main 2020 (Online) 6th September Evening Slot A circuit to verify Ohm's law uses ammeter and voltmeter in series or parallel connected correctly to the resistor. In t... JEE Main 2020 (Online) 6th September Evening Slot In the circuit, given in the figure currents in different branches and value of one resistor are shown. Then potential a... JEE Main 2020 (Online) 5th September Evening Slot A galvanometer of resistance G is converted into a voltmeter of range 0 – 1 V by connecting a resistance R1 in series wi... JEE Main 2020 (Online) 5th September Morning Slot An electrical power line, having a total resistance of 2 $$\Omega$$, delivers 1 kW at 220 V. The efficiency of the tran... JEE Main 2020 (Online) 5th September Morning Slot The value of current i1 flowing from A to C in the circuit diagram is : ... JEE Main 2020 (Online) 4th September Evening Slot Two resistors 400$$\Omega$$ and 800$$\Omega$$ are connected in series across a 6 V battery. The potential difference ... JEE Main 2020 (Online) 3rd September Evening Slot Model a torch battery of length $$l$$ to be made up of a thin cylindrical bar of radius ‘a’ and a concentric thin cylind... JEE Main 2020 (Online) 3rd September Morning Slot A potentiometer wire PQ of 1 m length is connected to a standard cell E1. Another cell E2 of emf 1.02 V is connected wit... JEE Main 2020 (Online) 2nd September Evening Slot A small point mass carrying some positive charge on it, is released from the edge of a table. There is a uniform electri... JEE Main 2020 (Online) 2nd September Evening Slot Consider four conducting materials copper, tungsten, mercury and aluminium with resistivity $$\rho$$C, $$\rho$$T, $$\r... JEE Main 2020 (Online) 2nd September Morning Slot A battery of 3.0 V is connected to a resistor dissipating 0.5 W of power. If the terminal voltage of the battery is 2.5 ... JEE Main 2020 (Online) 4th September Morning Slot The current i in the network is : ... JEE Main 2020 (Online) 9th January Evening Slot In the given circuit diagram, a wire is joining points B and D. The current in this wire is : ... JEE Main 2020 (Online) 9th January Morning Slot A galvanometer having a coil resistance 100$$\Omega $$gives a full scale deflection when a current of 1 mA is passed t... JEE Main 2020 (Online) 8th January Evening Slot The length of a potentiometer wire is 1200 cm and it carries a current of 60 mA. For a cell of emf 5V and internal resis... JEE Main 2020 (Online) 8th January Morning Slot In a building there are 15 bulbs of 45 W, 15 bulbs of 100 W, 15 small fans of 10 W and 2 heaters of 1 kW. The voltage of... JEE Main 2020 (Online) 7th January Evening Slot In the figure, potential difference between A and B is : ... JEE Main 2020 (Online) 7th January Evening Slot The current I1 (in A) flowing through 1$$\Omega $$resistor in the following circuit is : ... JEE Main 2020 (Online) 7th January Morning Slot A moving coil galvanometer, having a resistance G, produces full scale deflection when a current Ig flows through it. Th... JEE Main 2019 (Online) 12th April Evening Slot To verify Ohm's law, a student connects the voltmeter across the battery as, shown in the figure. The measured voltage i... JEE Main 2019 (Online) 12th April Morning Slot A galvanometer of resistance 100$$\Omega $$has 50 divisions on its scale and has sensitivitv of 20$$\mu $$A/division.... JEE Main 2019 (Online) 12th April Morning Slot The resistive network shown below is connected to a D.C. source of 16 V. The power consumed by the network is 4 Watt. Th... JEE Main 2019 (Online) 12th April Morning Slot Space between two concentric conducting spheres of radii a and b (b &gt; a) is filled with a medium of resistivity$$\rh... JEE Main 2019 (Online) 10th April Evening Slot In the given circuit, an ideal voltmeter connected across the 10$$\Omega$$ resistance reads 2V. The internal resistance... JEE Main 2019 (Online) 10th April Morning Slot A moving coil galvanometer allows a full scale current of 10–4A. A series resistance of 2 M$$\Omega$$ is required to co... JEE Main 2019 (Online) 10th April Morning Slot In an experiment, the resistance of a material is plotted as a function of temperature (in some range). As shown in the ... JEE Main 2019 (Online) 10th April Morning Slot Two wires A &amp; B are carrying currents I1 &amp; I2 as shown in the figure. The separation between them is d. A third ... JEE Main 2019 (Online) 10th April Morning Slot In a meter bridge experiment, the circuit diagram and the corresponding observation table are shown in figure .tg {bo... JEE Main 2019 (Online) 10th April Morning Slot A current of 5 A passes through a copper conductor (resistivity = 1.7 × 10–8 $$\Omega$$m) of radius of cross-section 5 ... JEE Main 2019 (Online) 10th April Morning Slot In a conductor, if the number of conduction electrons per unit volume is 8.5 × 1028 m–3 and mean free time is 25ƒs (femt... JEE Main 2019 (Online) 9th April Evening Slot The resistance of a galvanometer is 50 ohm and the maximum current which can be passed through it is 0.002 A. What resis... JEE Main 2019 (Online) 9th April Evening Slot A metal wire of resistance 3 $$\Omega$$ is elongated to make a uniform wire of double its previous length. This new wi... JEE Main 2019 (Online) 9th April Evening Slot A moving coil galvanometer has resistance 50$$\Omega$$ and it indicates full deflection at 4mA current. A voltmeter is ... JEE Main 2019 (Online) 9th April Morning Slot A wire of resistance R is bent to form a square ABCD as shown in the figure. The effective resistance between E and C is... JEE Main 2019 (Online) 9th April Morning Slot In the figure shown, what is the current (in Ampere) drawn from the battery ? You are given: R1 = 15$$\Omega$$, R2 = 10... JEE Main 2019 (Online) 8th April Evening Slot A cell of internal resistance r drives current through an external resistance R. The power delivered by the cell to the ... JEE Main 2019 (Online) 8th April Evening Slot In the circuit shown, a four-wire potentiometer is made of a 400 cm long wire, which extends between A and B. The resist... JEE Main 2019 (Online) 8th April Evening Slot For the circuit shown, with R1 = 1.0W, R2 = 2.0 W, E1 = 2 V and E2 = E3 = 4 V, the potential difference between the poin... JEE Main 2019 (Online) 8th April Morning Slot A 200 $$\Omega$$ resistor has a certain color code. If one replaces the red color by green in the code, the new resist... JEE Main 2019 (Online) 8th April Morning Slot In the given circuit diagram, the currents, I1 = – 0.3 A, I4 = 0.8 A and I5 = 0.4 A, are flowing as shown. The currents... JEE Main 2019 (Online) 12th January Evening Slot A galvanometer, whose resistance is 50 ohm, has 25 divisions in it. When a current of 4 $$\times$$ 10–4 A passes throu... JEE Main 2019 (Online) 12th January Evening Slot Two electric bulbs, rated at (25 W, 220 V) and (100 W, 220 V), are connected in series across a 220 V voltage source. If... JEE Main 2019 (Online) 12th January Morning Slot In a meter bridge, the wire of length 1 m has a non-uniform cross-section such that, the variation $${{dR} \over {d\ell ... JEE Main 2019 (Online) 12th January Morning Slot An ideal battery of 4 V and resistance R are connected in series in the primary circuit of a potentiometer of length 1 m... JEE Main 2019 (Online) 12th January Morning Slot In the figure shown, a circuit contains two identical resistors with resistance R = 5$$\Omega $$and an inductance with ... JEE Main 2019 (Online) 12th January Morning Slot The galvanometer deflection, when key K1 is closed but K2 is open, equals$$\theta $$0 (see figure). On closing K2 also ... JEE Main 2019 (Online) 12th January Morning Slot In the experimental set up of metre bridge shown in the figure, the null point is obtained at a distance of 40 cm from A... JEE Main 2019 (Online) 11th January Evening Slot In the circuit shown, the potential difference between A and B is : ... JEE Main 2019 (Online) 11th January Evening Slot A copper wire is wound on a wooden frame, whose shape is that of an equilateral triangle. If the linear dimension of eac... JEE Main 2019 (Online) 11th January Evening Slot A galvanometer having a resistance of 20$$\Omega $$and 30 divisions on both sides has figure of merit 0.005 ampere/div... JEE Main 2019 (Online) 11th January Evening Slot An electric field of 1000 V/m is applied to an electric dipole at angle of 45o. The value of electric dipole moment is 1... JEE Main 2019 (Online) 11th January Evening Slot In a Wheatstone bridge(see fig.), Resistances P and Q are approximately equal. When R = 400$$\Omega $$, the bridge is b... JEE Main 2019 (Online) 11th January Morning Slot In the circuit shown, the switch S1 is closed at time t = 0 and the switch S2 is kept open. At some later time(t0), th... JEE Main 2019 (Online) 11th January Morning Slot The resistance of the meter bridge AB in given figure is 4$$\Omega $$. With a cell of emf$$\varepsilon $$= 0.5 V and ... JEE Main 2019 (Online) 11th January Morning Slot The given graph shows variation (with distance r form centre) of : ... JEE Main 2019 (Online) 11th January Morning Slot Two equal resistances when connected in series to a battery, consume electric power of 60 W. If these resistances are no... JEE Main 2019 (Online) 11th January Morning Slot The actual value of resistance R, shown in the figure is 30$$\Omega $$. This is measuered in an experiment as shown usin... JEE Main 2019 (Online) 10th January Evening Slot The Wheatstone bridge shown in figure, here, gets balanced when the carbon resistor used as R1 has the colour code (Oran... JEE Main 2019 (Online) 10th January Evening Slot A current of 2 mA was passed through an unknown resistor which dissipated a power of 4.4 W. Dissipated power when an ide... JEE Main 2019 (Online) 10th January Evening Slot Four equal point charges Q each are placed in the xy plane at (0, 2), (4, 2), (4, –2) and (0, –2). The work required to ... JEE Main 2019 (Online) 10th January Evening Slot A potentiometer wire AB having length L and resistance 12 r is joined to a cell D of emf$$\varepsilon $$and internal r... JEE Main 2019 (Online) 10th January Morning Slot In the given circuit the cells have zero internal resistance. The currents (in Amperes) passing through resistance R1 an... JEE Main 2019 (Online) 10th January Morning Slot A 2 W carbon resistor is color coded with green, black, red and brown respectively. The maximum current which can be pas... JEE Main 2019 (Online) 10th January Morning Slot A uniform metallic wire has a resistance of 18$$\Omega $$and is bent into an equilateral triangle. Then, the resistanc... JEE Main 2019 (Online) 10th January Morning Slot A carbon resistance has a following colour code. What is the value of the resistance ? ... JEE Main 2019 (Online) 9th January Evening Slot In the given circuit the the internal resistance of the 18 V cell is negligible. If R1 = 400$$\Omega $$, R3 = 100$$\Om... JEE Main 2019 (Online) 9th January Evening Slot Drift speed of electrons, when 1.5 A of current flows in a copper wire of cross section 5 mm2, is $$\upsilon$$. If the ... JEE Main 2019 (Online) 9th January Morning Slot A resistance is shown in the figure. Its value and tolerance are given respectively by : ... JEE Main 2019 (Online) 9th January Morning Slot When the switch S, in the circuit shown, is closed, then the value of current i will be : ... JEE Main 2019 (Online) 9th January Morning Slot In a circuit for finding the resistance of a galvanometer by half deflection method, a 6 V battery and a high resistan... JEE Main 2018 (Online) 16th April Morning Slot A heating element has a resistance of 100 $$\Omega$$ at room temperature. When it is connected to a supply of 220 V, a... JEE Main 2018 (Online) 16th April Morning Slot A constant voltages is applied between two ends of a metallic wire. If the length is halved and the radius of the wire i... JEE Main 2018 (Online) 15th April Evening Slot A copper rod of cross-sectional area A carries a uniform current I through it. At temperature T, if the volume charge de... JEE Main 2018 (Online) 15th April Evening Slot In the given circuit all resistances are of value $$R$$ $$ohm$$ each. The equivalent resistance between $$A$$ and $$B$$ ... JEE Main 2018 (Online) 15th April Morning Slot In a meter bridge, as shown in the figure, it is given that resistance $$Y = 12.5\,\,\Omega$$ and that the balance is... JEE Main 2018 (Online) 15th April Morning Slot In a potentiometer experiment, it is found that no current passes through the galvanometer when the terminals of the cel... JEE Main 2018 (Offline) On interchanging the resistances, the balance point of a meter bridge shifts to the left by 10 cm. The resistance of the... JEE Main 2018 (Offline) Two batteries with e.m.f 12 V and 13 V are connected in parallel across a load resistor of 10 $$\Omega$$. The internal ... JEE Main 2018 (Offline) The figure shows three circuits I, II and III which are connected to a 3V battery. If the powers dissipated by the confi... JEE Main 2017 (Online) 9th April Morning Slot In a meter bridge experiment resistances are connected as shown in the figure. Initially resistance P = 4 $$\Omega$$ an... JEE Main 2017 (Online) 9th April Morning Slot A uniform wire of length 1 and radius r has a resistance of 100 $$\Omega$$. It is recast into a wire of radius $${r \o... JEE Main 2017 (Online) 9th April Morning Slot A 9 V battery with internal resistance of 0.5$$\Omega $$is connected across an infinite network as shown in the figu... JEE Main 2017 (Online) 8th April Morning Slot A potentiometer PQ is set up to compare two resistances as shown in the figure. The ammeter A in the circuit reads 1.0 A... JEE Main 2017 (Online) 8th April Morning Slot In the given circuit, the current in each resistance is: ... JEE Main 2017 (Offline) Which of the following statements is false? JEE Main 2017 (Offline) In the given circuit diagram when the current reaches steady state in the circuit, the charge on the capacitor of capaci... JEE Main 2017 (Offline) The resistance of an electrical toaster has a temperature dependence given by R(T) = R0 [1 +$$\alpha $$(T − T0)] in its... JEE Main 2016 (Online) 10th April Morning Slot In the circuit shown, the resistance r is a variable resistance. If for r = fR, the heat generation in r is maximum the... JEE Main 2016 (Online) 9th April Morning Slot The temperature dependence of resistance of$$Cu$$and undoped$$Si$$in the temperature range$$300-400K,$$is bes... JEE Main 2016 (Offline) In the circuit shown, the current in the$$1\Omega $$resistor is : ... JEE Main 2015 (Offline) When$$5V$$potential difference is applied across a wire of length$$0.1m,$$the drift speed of electrons is$$2.5... JEE Main 2015 (Offline) In a large building, three are $$15$$ bulbs of $$40$$ $$W$$, $$5$$ bulbs of $$100$$ $$W$$, $$5$$ fans of $$80$$ $$W$$ an... JEE Main 2014 (Offline) This questions has Statement - $${\rm I}$$ and Statement - $${\rm I}$$$${\rm I}$$. Of the four choices given after the S... JEE Main 2013 (Offline) The supply voltage to room is $$120V.$$ The resistance of the lead wires is $$6\Omega$$. A $$60$$ $$W$$ bulb is already... JEE Main 2013 (Offline) Two electric bulbs marked $$25W$$ $$-$$ $$220$$ $$V$$ and $$100W$$ $$-$$ $$220V$$ are connected in series to a $$440$$$...
AIEEE 2012
If a wire is stretched to make it $$0.1\%$$ longer, its resistance will:
AIEEE 2011
Two conductors have the same resistance at $${0^ \circ }C$$ but their temperature coefficients of resistance are $${\alp... AIEEE 2010 Let$$C$$be the capacitance of a capacitor discharging through a resistor$$R.$$Suppose$${t_1}$$is the time taken fo... AIEEE 2010 A$$5V$$battery with internal resistance$$2\Omega $$and a$$2V$$battery with internal resistance$$1\Omega $$are co... AIEEE 2008 Consider a block of conducting material of resistivity$$'\rho '$$shown in the figure. Current$$'I'$$enters at$$'A'\$...
AIEEE 2008
Consider a block of conducting material of resistivity $$'\rho '$$ shown in the figure. Current $$'I'$$ enters at $$'A'... AIEEE 2008 Shown in the figure below is a meter-bridge set up with null deflection in the galvanometer. The value of the unknown ... AIEEE 2008 The resistance of a wire is$$5$$ohm at$${50^ \circ }C$$and$$6$$ohm at$${100^ \circ }C.$$The resistance of the wi... AIEEE 2007 A battery is used to charge a parallel plate capacitor till the potential difference between the plates becomes equal to... AIEEE 2007 The current$${\rm I}$$drawn from the$$5$$volt source will be ... AIEEE 2006 The resistance of bulb filmanet is$$100\Omega $$at a temperature of$${100^ \circ }C.$$If its temperature coefficient... AIEEE 2006 In a Wheatstone's bridge, three resistance$$P, Q$$and$$R$$connected in the three arms and the fourth arm is formed b... AIEEE 2006 An electric bulb is rated$$220$$volt -$$100$$watt. The power consumed by it when operated on$$110$$volt will be AIEEE 2006 A thermocouple is made from two metals, Antimony and Bismuth. If one junction of the couple is kept hot and the other is... AIEEE 2006 An energy source will supply a constant current into the load if its internal resistance is AIEEE 2005 In a potentiometer experiment the balancing with a cell is at length$$240cm.$$On shunting the cell with a resist... AIEEE 2005 The resistance of hot tungsten filament is about$$10$$times the cold resistance. What will be resistance of$$100...
AIEEE 2005
Two voltmeters, one of copper and another of silver, are joined in parallel. When a total charge $$q$$ flows through the...
AIEEE 2005
A moving coil galvanometer has $$150$$ equal divisions. Its current sensitivity is $$10$$- divisions per milliampere and...
AIEEE 2005
Two sources of equal $$emf$$ are connected to an external resistance $$R.$$ The internal resistance of the two sources ...
AIEEE 2005
In the circuit, the galvanometer $$G$$ shows zero deflection. If the batteries $$A$$ and $$B$$ have negligible internal ...
AIEEE 2005
A heater coil is cut into two equal parts and only one part is now used in the heater. The heat generated will now be
AIEEE 2005
The Kirchhoff's first law $$\left( {\sum i = 0} \right)$$ and second law $$\left( {\sum iR = \sum E} \right),$$ where th...
AIEEE 2004
A material $$'B'$$ has twice the specific resistance of $$'A'.$$ A circular wire made of $$'B'$$ has twice the diameter ...
AIEEE 2004
The electrochemical equivalent of a metal is $${3.35109^{ - 7}}$$ $$kg$$ per Coulomb. The mass of the metal liberated at...
AIEEE 2004
The thermo $$emf$$ of a thermocouple varies with temperature $$\theta$$ of the hot junction as $$E = a\theta + b{\the... AIEEE 2004 In a meter bridge experiment null point is obtained at$$20cm$$, from one end of the wire when resistance$$X$$is... AIEEE 2004 Time taken by a$$836W$$heater to heat one litre of water from$$10{}^ \circ C$$to$$40{}^ \circ C$$is AIEEE 2004 Thermistors are usually made of AIEEE 2004 The total current supplied to the circuit by the battery is ... AIEEE 2004 The resistance of the series combination of two resistances is$$S.$$When they are jointed in parallel the total resist... AIEEE 2004 An electric current is passed through a circuit containing two wires of the same material, connected in parallel. If the... AIEEE 2004 A$$220$$volt,$$1000$$watt bulb is connected across a$$110volt$$mains supply. The power consumed will be AIEEE 2003 A$$3$$volt battery with negligible internal resistance is connected in a circuit as shown in the figure. The current ... AIEEE 2003 The nagative$$Zn$$pole of a Daniell cell, sending a constant current through a circuit, decreases in mass by$$0.13g$$... AIEEE 2003 An ammeter reads upto$$1$$ampere. Its internal resistance is$$0.81ohm$$. To increase the range to$$10A$$t... AIEEE 2003 The thermo$$e.m.f.$$of a thermo -couple is$$25\mu V/{}^ \circ C$$at room temperature. A galvanometer of$$40$$... AIEEE 2003 The length of a wire of a potentiometer is$$100cm$$, and the$$e.m.f.$$of its standard cell is$$E$$vo... AIEEE 2003 The length of a given cylindrical wire is increased by$$100\% $$. Due to the consequent decrease in diameter the change... AIEEE 2003 If$${\theta _1},$$is the inversion temperature,$${\theta _n}$$is the neutral temperature,$${\theta _c}$$is the te... AIEEE 2002 The mass of product liberated on anode in an electrochemical cell depends on (where$$t$$is the time period for which ... AIEEE 2002 If a current is passed through a spring then the spring will AIEEE 2002 If in the circuit, power dissipation is$$150W,$$then$$R$$is ... AIEEE 2002 A wire when connected to$$220V$$mains supply has power dissipation$${P_1}.$$Now the wire is cut into two equal ... AIEEE 2002 If an ammeter is to be used in place of a voltmeter, then we must connect with the ammeter a AIEEE 2002 ## Numerical More The current I flowing through the given circuit will be __________A. ... JEE Main 2022 (Online) 29th July Morning Shift An electrical bulb rated 220 V, 100 W, is connected in series with another bulb rated 220 V, 60 W. If the voltage across... JEE Main 2022 (Online) 28th July Evening Shift As shown in the figure, a potentiometer wire of resistance$$20 \,\Omega$$and length$$300 \mathrm{~cm}$$is connected ... JEE Main 2022 (Online) 28th July Morning Shift In the given figure of meter bridge experiment, the balancing length AC corresponding to null deflection of the galvanom... JEE Main 2022 (Online) 27th July Evening Shift A$$1 \mathrm{~m}$$long copper wire carries a current of$$1 \mathrm{~A}$$. If the cross section of the wire is$$2.0 \...
JEE Main 2022 (Online) 27th July Morning Shift
In a meter bridge experiment, for measuring unknown resistance 'S', the null point is obtained at a distance $$30 \mathr... JEE Main 2022 (Online) 27th July Morning Shift A potentiometer wire of length$$300 \mathrm{~cm}$$is connected in series with a resistance 780$$\Omega$$and a standa... JEE Main 2022 (Online) 26th July Evening Shift Resistances are connected in a meter bridge circuit as shown in the figure. The balancing length$$l_{1}$$is$$40 \math...
JEE Main 2022 (Online) 26th July Morning Shift
In a potentiometer arrangement, a cell of emf 1.20 V gives a balance point at 36 cm length of wire. This cell is now rep...
JEE Main 2022 (Online) 25th July Evening Shift
Eight copper wire of length $$l$$ and diameter $$d$$ are joined in parallel to form a single composite conductor of resi...
JEE Main 2022 (Online) 25th July Morning Shift
In the given figure, the value of Vo will be _____________ V. ...
JEE Main 2022 (Online) 25th July Morning Shift
The circuit diagram of potentiometer used to measure the internal resistance of a cell (E) is shown in figure. The key '...
JEE Main 2022 (Online) 30th June Morning Shift
In a potentiometer arrangement, a cell gives a balancing point at 75 cm length of wire. This cell is now replaced by ano...
JEE Main 2022 (Online) 24th June Morning Shift
A potentiometer wire of length 10 m and resistance 20 $$\Omega$$ is connected in series with a 25 V battery and an exter...
JEE Main 2022 (Online) 24th June Evening Shift
The total current supplied to the circuit as shown in figure by the 5 V battery is ____________ A. ...
JEE Main 2022 (Online) 25th June Morning Shift
A resistor develops 300 J of thermal energy in 15 s, when a current of 2 A is passed through it. If the current increase...
JEE Main 2022 (Online) 25th June Morning Shift
The length of a given cylindrical wire is increased to double of its original length. The percentage increase in the res...
JEE Main 2022 (Online) 25th June Evening Shift
Two 10 cm long, straight wires, each carrying a current of 5A are kept parallel to each other. If each wire experienced ...
JEE Main 2022 (Online) 26th June Evening Shift
The current density in a cylindrical wire of radius 4 mm is 4 $$\times$$ 106 Am$$-$$2. The current through the outer por...
JEE Main 2022 (Online) 27th June Morning Shift
A cell, shunted by a 8 $$\Omega$$ resistance, is balanced across a potentiometer wire of length 3 m. The balancing lengt...
JEE Main 2022 (Online) 27th June Morning Shift
In the given circuit 'a' is an arbitrary constant. The value of m for which the equivalent circuit resistance is minimum...
JEE Main 2022 (Online) 27th June Evening Shift
The current density in a cylindrical wire of radius r = 4.0 mm is 1.0 $$\times$$ 106 A/m2. The current through the outer...
JEE Main 2022 (Online) 27th June Evening Shift
Current measured by the ammeter (A) in the reported circuit when no current flows through 10 $$\Omega$$ resistance, will...
JEE Main 2022 (Online) 28th June Morning Shift
A meter bridge setup is shown in the figure. It is used to determine an unknown resistance R using a given resistor of 1...
JEE Main 2022 (Online) 28th June Morning Shift
All resistances in figure are 1 $$\Omega$$ each. The value of current 'I' is $${a \over 5}$$ A. The value of a is ______...
JEE Main 2022 (Online) 28th June Evening Shift
Two resistors are connected in series across a battery as shown in figure. If a voltmeter of resistance 2000 $$\Omega$$ ...
JEE Main 2022 (Online) 29th June Evening Shift
For the network shown below, the value of VB $$-$$ VA is ____________ V. ...
JEE Main 2022 (Online) 29th June Morning Shift
The variation of applied potential and current flowing through a given wire is shown in figure. The length of wire is 31...
JEE Main 2022 (Online) 29th June Morning Shift
A uniform heating wire of resistance 36$$\Omega$$ is connected across a potential difference of 240 V. The wire is then ...
JEE Main 2021 (Online) 1st September Evening Shift
A resistor dissipates 192 J of energy in 1s when a current of 4A is passed through it. Now, when the current is doubled,...
JEE Main 2021 (Online) 31st August Evening Shift
The voltage drop across 15$$\Omega$$ resistance in the given figure will be ______________ V....
JEE Main 2021 (Online) 31st August Morning Shift
A square shaped wire with resistance of each side 3$$\Omega$$ is bent to form a complete circle. The resistance between ...
JEE Main 2021 (Online) 31st August Morning Shift
The ratio of the equivalent resistance of the network (shown in figure) between the points a and b when switch is open a...
JEE Main 2021 (Online) 27th August Evening Shift
First, a set of n equal resistors of 10 $$\Omega$$ each are connected in series to a battery of emf 20V and internal res...
JEE Main 2021 (Online) 27th August Morning Shift
For the circuit shown, the value of current at time t = 3.2 s will be _________ A.[Voltage distribution V(t) is shown by...
JEE Main 2021 (Online) 27th July Evening Shift
An electric bulb rated as 200 W at 100 V is used in a circuit having 200 V supply. The resistance 'R' that must be put i...
JEE Main 2021 (Online) 25th July Morning Shift
In an electric circuit, a cell of certain emf provides a potential difference of 1.25 V across a load resistance of 5$$\... JEE Main 2021 (Online) 22th July Evening Shift In the given figure switches S1 and S2 are in open condition. The resistance across ab when the switches S1 and S2 are c... JEE Main 2021 (Online) 20th July Evening Shift Consider a 72 cm long wire AB as shown in the figure. The galvanometer jockey is placed at P on AB at a distance x cm fr... JEE Main 2021 (Online) 18th March Evening Shift Two wires of same length and thickness having specific resistances 6$$\Omega$$cm and 3$$\Omega$$cm respectively are co... JEE Main 2021 (Online) 18th March Evening Shift The voltage across the 10$$\Omega$$resistor in the given circuit is x volt.The value of 'x' to the nearest integer is _... JEE Main 2021 (Online) 18th March Morning Shift The equivalent resistance of series combination of two resistors is 's'. When they are connected in parallel, the equiva... JEE Main 2021 (Online) 17th March Morning Shift The energy dissipated by a resistor is 10 mJ in 1 s when an electric current of 2 mA flows through it. The resistance is... JEE Main 2021 (Online) 16th March Evening Shift In the figure given, the electric current flowing through the 5 k$$\Omega$$resistor is 'x' mA.The value of x to the nea... JEE Main 2021 (Online) 16th March Morning Shift In an electrical circuit, a battery is connected to pass 20C of charge through it in a certain given time. The potential... JEE Main 2021 (Online) 26th February Morning Shift A current of 6A enters one corner P of an equilateral triangle PQR having 3 wires of resistance 2$$\Omega$$each and lea... JEE Main 2021 (Online) 25th February Evening Shift In the given circuit of potentiometer, the potential difference E across AB (10 m length) is larger than E1 and E2 as we... JEE Main 2021 (Online) 25th February Morning Slot A cylindrical wire of radius 0.5 mm and conductivity 5$$\times$$107 S/m is subjected to an electric field of 10 mV/m. ... JEE Main 2021 (Online) 24th February Evening Slot Four resistances 40$$\Omega $$, 60$$\Omega $$, 90$$\Omega $$and 110$$\Omega $$make the arms of a quadrilateral ABC... JEE Main 2020 (Online) 4th September Evening Slot In a meter bridge experiment S is a standard resistance. R is a resistance wire. It is found that balancing length is$$...
JEE Main 2020 (Online) 9th January Evening Slot
The series combination of two batteries, both of the same emf 10 V, but different internal resistance of 20$$\Omega$$ a...
JEE Main 2020 (Online) 8th January Evening Slot
Four resistances of 15$$\Omega$$, 12$$\Omega$$, 4$$\Omega$$ and 10$$\Omega$$ respectively in cyclic order to form Wh...
JEE Main 2020 (Online) 8th January Morning Slot
The balancing length for a cell is 560 cm in a potentiometer experiment. When an external resistance of 10 $$\Omega$$ i...
JEE Main 2020 (Online) 7th January Evening Slot

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