NEET-UG SERIES

Physics

Magnetism And Matter

31 previous year questions.

Volume: 31 Ques

Yield: High

High-Yield Trend

3

2024

1

2023

2

2021

1

2020

1

2019

2

2017

1

2016

1

2015

1

2014

1

2013

2

2012

3

2010

1

2009

2

2006

2

2005

Chapter Questions
31 MCQs

01

PYQ 1994

medium

physics ID: neet-ug-

A bar magnet is oscillating in the earth's magnetic field with a period . What happens to its period and motion if its mass is quadrupled?

1

Motion remains SH with time period = 4T

2

Motion remains SH and period remains nearly constant

3

Motion remains SH with time period

4

Motion remains SH with time period = 2T

02

PYQ 1999

medium

physics ID: neet-ug-

If a diamagnetic substance is brought near the north or the south pole of a bar magnet, it is

1

Repelled by the north pole and attracted by the south pole

2

Attracted by the north pole and repelled by the south pole

3

Attracted by both the poles

4

Repelled by both the poles

03

PYQ 2000

easy

physics ID: neet-ug-

Which species does not exhibits paramagnetism:

1

2

3

4

04

PYQ 2001

medium

physics ID: neet-ug-

Among which the magnetic susceptibility does not depend on the temperature

1

Dia-magnetis

2

Paramagnetis

3

Ferro-magnetism

4

Ferrite

05

PYQ 2003

medium

physics ID: neet-ug-

A bar magnet is oscillating in the Earth's magnetic field with a period T. What happens to this period and motion if this mass is quadrupled:

1

Motion remains S.H. with time period =

2

Motion remains S.H. with time period = 2T

3

Motion remains S.H. with time period = 4T

4

Motion remains S.H. with time and period remains nearly constant

06

PYQ 2003

medium

physics ID: neet-ug-

According to Curie's law, the magnetic susceptibility of a substance at an absolute temperature is proportional to

1

1 /T

2

T

3

4

07

PYQ 2003

medium

physics ID: neet-ug-

A diamagnetic material in a magnetic field moves

1

from stronger to the weaker parts of the field

2

from weaker to the stronger parts of the field

3

perpendicular to the field

4

in none of the above directions

08

PYQ 2005

medium

physics ID: neet-ug-

A coil in the shape of an equilateral triangle of side l is suspended between the pole pieces of a permanent magnet such that is in plane of the coil. If due to a current i in the triangle a torque acts on it, the side l of the triangle is

1

2

3

4

09

PYQ 2005

medium

physics ID: neet-ug-

If the magnetic dipole moment of an atom of diamagnetic material, paramagnetic material and ferromagnetic material are denoted ny and respectively, then

1

and

2

and

3

and

4

and

10

PYQ 2006

medium

physics ID: neet-ug-

Above Curie temperature :

1

a ferromagnetic substance becomes paramagnetic

2

a paramagnetic substance becomes diamagnetic

3

a diamagnetic substance becomes paramagnetic

4

a paramagnetic substance becomes ferromagnetic

11

PYQ 2006

medium

physics ID: neet-ug-

Above Curie temperature :

1

a ferromagnetic substance becomes paramagnetic

2

a paramagnetic substance becomes diamagnetic

3

a diamagnetic substance becomes paramagnetic

4

a paramagnetic substance becomes ferromagnetic

12

PYQ 2009

medium

physics ID: neet-ug-

A bar magnet having a magnetic movement of is free to rotate in a horizontal plane. A horizontal magnetic field T exists in the space. The work done in taking the magnet slowly from a direction parallel to the field to a direction from the field is :

1

12 J

2

6 J

3

2 J

4

0.6 J

13

PYQ 2010

medium

physics ID: neet-ug-

The magnetic moment of a diamagnetic atom is

1

much greater than one

2

1

3

between zero and one

4

equal to zero

14

PYQ 2010

medium

physics ID: neet-ug-

A vibration magnetometer placed in magnetic meridian has a small bar magnet. The magnet executes oscillations with a time period of sec in earth's horizontal magnetic field of microtesla. When a horizontal field of microtesla is produced opposite to the earth's field by placing a current carrying wire, the new time period of magnet will be

1

1 s

2

2 s

3

3 s

4

4 s

15

PYQ 2010

medium

physics ID: neet-ug-

Electromagnets are made of soft iron because soft iron has

1

low retentivity and high coercive force

2

high retentivity and high coercive force

3

low retentivity and low coercive force

4

high retentivity and low coercive force

16

PYQ 2012

medium

physics ID: neet-ug-

A magnetic needle suspended parallel to a magnetic field requires of work to turn it through The torque needed to maintain the needle in this position will be

1

2

3

4

17

PYQ 2012

medium

physics ID: neet-ug-

A compass needle which is allowed to move in a horizontal plane is taken to a geomagnetic pole. It.

1

will become rigid showing no movement

2

will stay in any position

3

will stay in north-south direction only

4

will stay in east-west direction only

18

PYQ 2013

easy

physics ID: neet-ug-

A bar magnet of length '' and magnetic dipole moment 'M' is bent in the form of an arc as shown in figure. The new magnetic dipole moment will be

1

2

3

4

19

PYQ 2014

medium

physics ID: neet-ug-

Following figures show the arrangement of bar magnets in different configurations. Each magnet has magnetic dipole moment . Which configuration has highest net magnetic dipole moment?

1

-1

2

-2

3

-3

4

-4

20

PYQ 2015

medium

physics ID: neet-ug-

A rectangular coil of length 0.12 m and width 0.1 m having 50 turns of wire is suspended vertically in a uniform magnetic field of strength 0.2 Weber/ . The coil carries a current of 2 A. If the plane of the coil is inclined at an angle of 30 with the direction of the field, the torque required to keep the coil in stable equilibrium will be

1

0.24 Nm

2

0.12Nm

3

0.15Nm

4

0.20 Nm

21

PYQ 2016

easy

physics ID: neet-ug-

A bar magnet is hung by a thin cotton thread in a uniform horizontal magnetic field and is in equilibrium state. The energy required to rotate it by is . Now the torque required to keep the magnet in this new position is

1

2

3

4

22

PYQ 2017

medium

physics ID: neet-ug-

If and be the apparent angles of dip observed in two vertical planes at right angles to each other, then the true angle of dip is given by :

1

2

3

4

23

PYQ 2017

medium

physics ID: neet-ug-

If and be the apparent angles of dip observed in two vertical planes at right angles to each other, then the true angle of dip is given by :

1

2

3

4

24

PYQ 2019

easy

physics ID: neet-ug-

At a point on the earth's surface the angle of dip. = +25?. Ata point Bon the earth's surface the angle of dip, = -25?. We can interpret that:

25

PYQ 2020

easy

physics ID: neet-ug-

An iron rod of susceptibility 599 is subjected to a magnetising field of 1200 A . The permeability of the material of the rod is :

1

2

3

4

26

PYQ 2021

medium

physics ID: neet-ug-

A uniform conducting wire of length 12a and resistance ‘R’ is wound up as a current-carrying coil in the shape of, (i) an equilateral triangle of side ‘a’. (ii) a square of side ‘a’. The magnetic dipole moments of the coil in each case respectively are:

1

4Ia 2 and 3Ia 2

2

\sqrt3Ia 2 and 3Ia 2

3

3Ia 2 and Ia 2

4

3Ia 2 and 4Ia 2

27

PYQ 2021

medium

physics ID: neet-ug-

A capacitor of capacitance ‘C’, is connected across an ac source of voltage V, given by V=V 0 sinωt The displacement current between the plates of the capacitor, would then be given by

1

2

3

4

28

PYQ 2023

easy

physics ID: neet-ug-

A big circular coil of 1000 turns and average radius 10 m is rotating about its horizontal diameter at 2 rad s -1 . If the vertical component of earth’s magnetic field at that place is 2 \times 10 -5 T and electrical resistance of the coil is 12.56 Ω, then the maximum induced current in the coil will be:

1

0.25 A

2

1.5 A

3

1 A

4

2 A

29

PYQ 2024

medium

physics ID: neet-ug-

The incorrect relation for a diamagnetic material (all the symbols carry their usual meaning and ε is a small positive number) is:

1

2

3

4

30

PYQ 2024

easy

physics ID: neet-ug-

The magnetic potential energy, when a magnetic bar of magnetic moment is placed perpendicular to the magnetic field, is:

1

2

Zero

3

4

31

PYQ 2024

medium

physics ID: neet-ug-

The magnetic moment and moment of inertia of a magnetic needle as shown are, respectively, and . If it completes 10 oscillations in 10 s, the magnitude of the magnetic field is:

1

0.4 T

2

4 T

3

0.4 mT

4

4 mT