NEET-UG SERIES

Physics

Magnetic Field

18 previous year questions.

Volume: 18 Ques

Yield: Medium

High-Yield Trend

5

2024

1

2020

4

2019

1

2015

1

2014

2

2013

1

1997

1

1996

1

1991

1

1990

Chapter Questions
18 MCQs

01

PYQ 1990

medium

physics ID: neet-ug-

The magnetic induction at a point P which is at the distance of 4 cm from a long current carrying wire is T. The field of induction at a distance 12 cm from the current will be

1

2

3

4

02

PYQ 1991

easy

physics ID: neet-ug-

A 100 millihenry coil carries a current of 1 A. Energy stored in its magnetic field is

1

0.5 J

2

1 A

3

0.05 J

4

0.1 J

03

PYQ 1996

medium

physics ID: neet-ug-

Two equal electric currents are flowing perpendicular to each other as shown in the figure. AB and CD are perpendicular to each other and symmetrically placed with respect to the currents. Where do we expect the resultant magnetic field to be zero?

1

On CD

2

On AB

3

On both OD and BO

4

On both AB and CD

04

PYQ 1997

medium

physics ID: neet-ug-

Tesla is the unit of

1

electric field

2

magnetic field

3

electric flux

4

magnetic flux

05

PYQ 2013

medium

physics ID: neet-ug-

A current loop in a magnetic field

1

Experiences a torque whether the field is uniform or non uniform in all orientations

2

Can be in equilibrium in one orientation

3

Can be in equilibrium in two orientations, both the equilibrium states are unstable

4

Can be in equilibrium in two orientations, one stable while the other is unstable

06

PYQ 2013

medium

physics ID: neet-ug-

A wire loop is rotated in a magnetic field. The frequency of change of direction of the induced

1

Once per revolution

2

Twice per revolution

3

Four times per revolution

4

Six times per revolution

07

PYQ 2014

medium

physics ID: neet-ug-

Two identical long conducting wires AOB and COD are placed at right angle to each other, with one above other such that 'O' is their common point for the two. The wires carry I 1 and I 2 currents, respectively. Point 'P' is lying at distance 'd' from 'O' along a direction perpendicular to the plane containing the wires. The magnetic field at the point 'P' will be:

1

2

3

4

08

PYQ 2015

medium

physics ID: neet-ug-

An electron moving in a circular orbit of radius r makes n rotations per second. The magnetic field produced at the centre has magnitude

1

2

3

4

Zero

09

PYQ 2019

medium

physics ID: neet-ug-

At a point A on the earth's surface the angle of dip, . At a point B on the earth's surface the angle of dip, . We can interpret that:

1

A and B are both located in the northern hemisphere.

2

A is located in the southern hemisphere and Bis located in the northern hemisphere.

3

A is located in the northern hemisphere and Bis located in the southern hemisphere.

4

A and B are both located in the southern hemisphere.

10

PYQ 2019

medium

physics ID: neet-ug-

A 800 turn coil of effective area is kept perpendicular to a magnetic field When the plane of the coil is rotated by around any of its coplanar axis in, the emf induced in the coil will be:

1

2

3

4

11

PYQ 2019

medium

physics ID: neet-ug-

Ionized hydrogen atoms and a-particles with same momenta enters perpendicular to a constant magnetic field, B. The ratio of their radii of their paths will be:

1

2:1

2

1:2

3

4:1

4

1:4

12

PYQ 2019

easy

physics ID: neet-ug-

A bar magnet placed in a uniform magnetic field making an angle with the field experiences a torque. If the angle made by the magnet with the field is doubled, the torque experienced by the magnet increases by . The initial angle made by the magnet with the magnetic field is

1

2

3

4

13

PYQ 2020

medium

physics ID: neet-ug-

A wire of length metre carrying a current of ampere is bent in the form of a circle. Its magnetic moment is,

1

2

3

4

14

PYQ 2024

medium

physics ID: neet-ug-

A sheet is placed on a horizontal surface in front of a strong magnetic pole. A force is needed to : A. hold the sheet there if it is magnetic. B. hold the sheet there if it is non-magnetic. C. move the sheet away from the pole with uniform velocity if it is conducting. D. move the sheet away from the pole with uniform velocity if it is both, non-conducting and non-polar. Choose the correct statement(s) from the options given below :

1

B and D only

2

A and C only

3

A, C and D only

4

C only

15

PYQ 2024

hard

physics ID: neet-ug-

Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R. Assertion A : The potential (V) at any axial point, at 2 m distance(r) from the centre of the dipole of dipole moment vector of magnitude, 4 \times 10 -6 C m, is \pm 9 \times 10 3 V. (Take SI units) Reason R :, where r is the distance of any axial point, situated at 2 m from the centre of the dipole. In the light of the above statements, choose the correct answer from the options given below :

1

Both A and R are true and R is the correct explanation of A.

2

Both A and R are true and R is NOT the correct explanation of A.

3

A is true but R is false.

4

A is false but R is true.

16

PYQ 2024

hard

physics ID: neet-ug-

A tightly wound turns coil of radius carries a current of . The magnitude of the magnetic field at the centre of the coil is (Take permeability of free space as SI units):

1

2

3

4

17

PYQ 2024

easy

physics ID: neet-ug-

In a uniform magnetic field of, a magnetic needle performs complete oscillations in seconds as shown. The moment of inertia of the needle is . If the magnitude of magnetic moment of the needle is; then the value of '' is

1

2

3

4

18

PYQ 2024

hard

physics ID: neet-ug-

An iron bar of length L has magnetic moment M. It is bent at the middle of its length such that the two arms make an angle 60° with each other. The magnetic moment of this new magnet is :

1

M

2

3

2M

4