# Current Electricity · Physics · COMEDK

Start Practice## MCQ (Single Correct Answer)

COMEDK 2024 Evening Shift

Three bulbs of $$40 \mathrm{~W}, 60 \mathrm{~W}$$, and $$100 \mathrm{~W}$$ are arranged in series with a $$220 \mathrm{~V}$$ source. The maximum light...

COMEDK 2024 Evening Shift

The resistance of a $$10 \mathrm{~m}$$ long wire is $$10 \Omega$$. Its length is increased by $$25 \%$$ by stretching the wire uniformly. The new resi...

COMEDK 2024 Evening Shift

Four resistors, each of resistance R, are connected as shown in the figure below.
...

COMEDK 2024 Evening Shift

A voltmeter of resistance $$1000 \Omega .0 .5 \mathrm{~V} /$$ div is to be converted into a voltmeter to make it to read $$=1 \mathrm{~V} / \mathrm{di...

COMEDK 2024 Morning Shift

The resistance of the galvanometer and shunt of an ammeter are $$90 \mathrm{~ohm}$$ and $$10 \mathrm{~ohm}$$ respectively, then the fraction of the ma...

COMEDK 2024 Morning Shift

A $$500 \mathrm{~W}$$ heating unit is designed to operate on a $$400 \mathrm{~V}$$ line. If line voltage drops to $$160 \mathrm{~V}$$, the percentage ...

COMEDK 2024 Morning Shift

A cell of emf E and internal resistance r is connected to two external resistances $$\mathrm{R_1}$$ and $$\mathrm{R_2}$$ and a perfect ammeter. The cu...

COMEDK 2024 Morning Shift

The current through a conductor is '$$\mathrm{a}$$' when the temperature is $$0^{\circ} \mathrm{C}$$. It is '$$\mathrm{b}$$' when the temperature is $...

COMEDK 2024 Morning Shift

On increasing the temperature of a conductor, its resistance increases because

COMEDK 2023 Morning Shift

A galvanometer having a resistance of $$8 \Omega$$ is shunted by a wire of resistance $$2 \Omega$$. If the total current is $$1 \mathrm{~A}$$, the par...

COMEDK 2023 Morning Shift

Two cells with the same emf $$E$$ and different internal resistances $$r_1$$ and $$r_2$$ are connected in series to an external resistance $$R$$. If t...

COMEDK 2023 Evening Shift

The current sensitivity of a galvanometer having 20 divisions is $$10 \mu \mathrm{A} /$$ div. If the resistance of the galvanometer is $$100 \Omega$$ ...

COMEDK 2023 Evening Shift

The electric flux from cube of side $$1 \mathrm{~m}$$ is '$$\Phi$$' When the side of the cube is made $$3 \mathrm{~m}$$ and the charge enclosed by the...

COMEDK 2023 Evening Shift

A resistor of wire $$24 \mathrm{~cm}$$ length and resistance $$8 \Omega$$ is stretched in to a uniform wire of $$48 \mathrm{~cm}$$ length, then the ne...

COMEDK 2023 Evening Shift

The SI unit of electrical conductivity is :

COMEDK 2023 Evening Shift

The current passing through the 100$$\Omega$$ resistor in the given electrical circuit is :
...

COMEDK 2023 Evening Shift

A battery is made of 12 cells having emf $$5 \mathrm{~V}$$ each. If three cells are unknowingly connected wrong, the resultant emf of the battery will...

COMEDK 2023 Evening Shift

The current drawn by the primary coil of an ideal transformer, which steps up $$22 \mathrm{~V}$$ into $$220 \mathrm{~V}$$, to operate a device having ...

COMEDK 2022

A galvanometer having a resistance of 4 $$\Omega$$ is shunted by a wire of resistance 2 $$\Omega$$. If the total current is 1.5 A, the current passing...

COMEDK 2022

A cell of emf 2 V is connected with a load of resistance 1.5 $$\Omega$$. The power delivered by the cell to the load is maximum, then power transferre...

COMEDK 2021

The resistance of a wire is R ohm. If it is melted and stretched to n times its original length, its new resistance will be

COMEDK 2021

For the given electrical arrangement, what is the value of current I?
...

COMEDK 2020

If voltage $$V=(200\pm 8)V$$ and current $$I=(20\pm0.5)A$$, then the percentage error in resistance R is

COMEDK 2020

Point out the right statements about the validity
of Kirchhoff’s junction rule,

COMEDK 2020

If $$P=Q=R=10\Omega$$ and $$S=20\Omega$$, then what resistance should be joined with S to balance the Wheatstone's network?

COMEDK 2020

To the potentiometer wire of length L and 10$$\Omega$$ resistance, a battery of emf 2.5 V and a resistance R are connected in series. If a potential d...