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Moving Charges and Magnetism

Physics

Previous Years Questions

MCQ (Single Correct Answer)

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From Ampere's circuital law for a long straight wire of circular cross-section carrying a steady current, the variation ...
NEET 2022
A square loop of side 1 m and resistance 1 $$\Omega$$ is placed in a magnetic field of 0.5 T. If the plane of loop is pe...
NEET 2022
Given below are two statements: Statement I : Biot-Savart's law gives us the expression for the magnetic field strength ...
NEET 2022
A long solenoid of radius 1 mm has 100 turns per mm. If 1 A current flows in the solenoid, the magnetic field strength a...
NEET 2022
An infinitely long straight conductor carries a current of 5A as shown. An electron is moving with a speed of 105 m/s pa...
NEET 2021
A long solenoid of 50 cm length having 100 turns carries a current of 2.5 A. The magnetic field at the centre of the sol...
NEET 2020 Phase 1
Ionized hydrogen atoms and $$\alpha $$-particles with same momenta enters perpendicular to a constant magnetic field, B....
NEET 2019
A cylinderical conductor of radius R is carrying a constant current. The plot of the magnitude of the magnetic field. B ...
NEET 2019
Current sensitivity of a moving coil galvanometer is 5 div/mA and its voltage sensitivity (angular deflection per unit v...
NEET 2018
A metallic rod of mass per unit length 0.5 kg m–1 is lying horizontally on a smooth inclined plane which makes an angle ...
NEET 2018
An arrangement of three parallel straight wires placed perpendicular to plane of paper carrying same current $$'I'$$ alo...
NEET 2017
A square loop ABCD carrying a current $$i$$, is placed near and coplanar with a long straight conductor XY carrying a cu...
NEET 2016 Phase 1
A long straight wire of radius $$a$$ carries a steady current $$I$$. The current is uniformly distributed over its cross...
NEET 2016 Phase 1
An electron is moving in a circular path under the influence of a transverse magnetic field of 3.57 $$ \times $$ 10-2 T....
NEET 2016 Phase 2
A long wire carrying a steady current is bent into a circular loop of one turn. The magnetic field at the centre of the ...
NEET 2016 Phase 2
A wire carrying current $$I$$ has the shape shown in adjoining figure. Linear parts of the wire are very long and para...
AIPMT 2015 Cancelled Paper
A conducting square frame of side 'a' and a long straight wire carrying current $$I$$ are located in the same plane as s...
AIPMT 2015 Cancelled Paper
An electron moving in a circular orbit of radius r makes n rotations per second. The magnetic field produced at the cent...
AIPMT 2015 Cancelled Paper
A proton and an alpha particle both enter a region of uniform magnetic field B, moving at right angles to the field B. I...
AIPMT 2015
In an ammeter 0.2% of main current passes through the galvanometer. If resistance of galvanometer is G, the resistance o...
AIPMT 2014
Two identical long conducting wires $$AOB$$ and $$COD$$ are placed at right angle to each other, with one above other su...
AIPMT 2014
A circular coil ABCD carrying a current 'i' is placed in a uniform magnetic field. If the magnetic force on the segment ...
NEET 2013 (Karnataka)
A long straight wire carries a certain current and produces a magnetic field 2 $$ \times $$ 10$$-$$4 Wb m$$-$$2 at a per...
NEET 2013 (Karnataka)
When a proton is released from rest in a room, it starts with an initial acceleration $$a$$0 towards west. When it is pr...
NEET 2013
An alternating electric field, of frequency $$v$$, is applied across the does (radius = R) of a cyclotron that is being ...
AIPMT 2012 Prelims
Two similar coils of radius R are lying concentrically with their planes at right angles to each other. The currents flo...
AIPMT 2012 Prelims
A proton carrying 1 MeV kinetic energy is moving in a circular path of radius R in uniform magnetic field. What should b...
AIPMT 2012 Mains
A milli voltmeter of 25 milli volt range is to be converted into an ammeter of 25 ampare range. The value (in ohm) of ne...
AIPMT 2012 Prelims
A square loop, carrying a teady current $$I$$, is placed in a horizontal plane near a long straight conductor carrying a...
AIPMT 2011 Mains
A galvanometer of resistance, G, is shunted by a resistance S ohm. To keep the main current in the circuit unchanged, th...
AIPMT 2011 Mains
A current carrying closed loop in the form of a right angle isosceles triangle ABC is placed in uniform magnetic field a...
AIPMT 2011 Prelims
A uniform electric field and a uniform magnetic field are acting along the same direction in a certain region. If an ele...
AIPMT 2011 Prelims
Charge q is uniformly spread on a thin ring of radius R. The ring rotates about its axis with a uniform frequency $$f$$ ...
AIPMT 2011 Mains
A closely wound solenoid of 2000 turns and area of cross-section 1.5 $$ \times $$ 10$$-$$4 m2 carries a current of 2.0 A...
AIPMT 2010 Mains
A particle having a mass of 10$$-$$2 kg carries a charge of 5 $$ \times $$ 10$$-$$8 C. The particle is given an initial ...
AIPMT 2010 Mains
A square current carrying loop is suspended in a uniform magnetic field acting in the plane of the loop. If the force on...
AIPMT 2010 Prelims
A current loop consists of two identical semicircular parts each of radius R, one lying in the x-y plane and the other i...
AIPMT 2010 Mains
A galvanometer has a coil of resistance 100 ohm and gives a full scale deflection for 30 mA current. If it is to work as...
AIPMT 2010 Prelims
A galvanometer has a coil of resistance 100 ohm and gives a full scale deflection for 30 mA current. If it is to work as...
AIPMT 2010 Prelims
Charge q is uniformly spread on a thin ring of radius R. The ring rotates about its axis with a uniform frequency $$f$$ ...
AIPMT 2010 Prelims
Under the influence of a uniform magnetic field, a charged particle moves with constant speed v in a circle of radius R....
AIPMT 2009
A galvanometer havings a coil resistance of 60 $$\Omega $$ shows full scale deflection when a current of 1.0 amp passes ...
AIPMT 2009
The magnetic force acting on a charged particle of charge $$-$$2 $$\mu $$C in a magnetic frield of 2 T acting in y direc...
AIPMT 2009
A galvanometer of resistance 50 $$\Omega $$ is connected to a battery of 3 V along with a resistance of 2950 $$\Omega $$...
AIPMT 2008
A closed loop PQRS carrying a current is placed in a uniform magnetic field. If the magnetic forces on segments PS, SR a...
AIPMT 2008
A particle of mass m, charge Q and kinetic energy T enters a transverse uniform magnetic field of induction $$\overright...
AIPMT 2008
The resistance of an ammeter is 13 $$\Omega $$ and its scale is graduated for a current upto 100 amps. After an addition...
AIPMT 2007
Under the influence of a uniform magnetic field, a charged particle moves with constant speed v in a circle of radius R....
AIPMT 2007
When a charged particle moving with velocity $$\overrightarrow v $$ is subjected to a magnetic field of induction $$\ove...
AIPMT 2006
Two circular coils 1 and 2 are made from the same wire but the radius of the 1st coil is twice that of the 2nd coil. Wha...
AIPMT 2006
A very long straight wire carries a current $$I$$. At the instant when a charge +Q at point P has velocity $$\overrighta...
AIPMT 2005
An electron moves in a circular orbit with a uniform speed v. It producess a magnetic field B at the centre of the circl...
AIPMT 2005
To convert a galvanometer into a voltmeter one should connect a
AIPMT 2004
A galvanometer of 50 ohm resistance has 25 divisions. A current of 4 $$ \times $$ 10$$-$$4 ampere gives a deflection of ...
AIPMT 2004
A long solenoid carrying a current producess a magnetic field B along its axis. If the current is doubled and the number...
AIPMT 2003
A charged particle moves through a magnetic field in a firection perpendicular to it. Then the
AIPMT 2003
The magnetic field of given length of wire for single turn coil at its centre is B then its value for two turns coil for...
AIPMT 2002
A charge q moves in a region where electric field and magnetic field both exist, then force on it is
AIPMT 2002
To convert a galvanometer into a voltmeter one should connect a
AIPMT 2002
An electron having mass m and kinetic energy E anter in uniform magnetic field B perpendiculaly, then its frequency will...
AIPMT 2001
If number of turns, area and current through a coil is given by n, A and $$i$$ respectively then its magnetic moment wil...
AIPMT 2001
The magnetic field at centre, P will be ...
AIPMT 2000

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