Magnetism : General Science MCQ Practice Questions & Answers (Hindi)

General ScienceEasyMagnetism

1.

Example for magnetic material used in data storage devices

A

45 Permalloy

B

$CrO_2$

C

Cunife

D

Alnico

General ScienceEasyMagnetism

2.

Example for hard magnet

A

45 Permalloy

B

$CrO_2$

C

Fe-Pd

D

Alnico

General ScienceEasyMagnetism

3.

Example for soft magnet

A

45 Permalloy

B

$CrO_2$

C

Fe-Pd

D

Alnico

General ScienceEasyMagnetism

4.

Typical thickness of Bloch walls ................(nm).

A

0.1-1

B

$10^{-1}$

C

$10^{-50}$

D

100

General ScienceEasyMagnetism

5.

Typical size of magnetic domains ................(mm).

A

$10^{-1}$

B

0.1-1

C

0.05

D

0.001

General ScienceEasyMagnetism

6.

Magnetic susceptibility ferro-magnetic materials is

A

+10 raised to -5

B

-10 raised to -5

C

10 raised to 5

D

10 raised to -5 to 10 raised to -2

General ScienceEasyMagnetism

7.

Magnetic susceptibility dia--magnetic materials is

A

+10 raised to -5

B

-10 raised to -5

C

10 raised to 5

D

10 raised to -5 to 10 raised to -2

General ScienceEasyMagnetism

8.

Magnetic susceptibility para-magnetic materials is

A

+10 raised to -5

B

-10 raised to -5

C

10 raised to 5

D

10 raised to -5 to 10 raised to -2

General ScienceEasyMagnetism

9.

Electromagnets are used in

A

loud speakers

B

door bells

C

both a and b

D

cabinet doors

General ScienceEasyMagnetism

10.

Example for ferri-magnetic materials

A

salts of transition elements

B

rare earth elements

C

transition metals

D

Ferrites

General ScienceEasyMagnetism

11.

Example for anti-ferro-magnetic materials

A

salts of transition elements

B

rare earth elements

C

transition metals

D

Ferrites

General ScienceEasyMagnetism

12.

Example for ferro-magnetic materials

A

super conductors

B

alkali metals

C

transition metals

D

Ferrites

General ScienceEasyMagnetism

13.

Example for para-magnetic materials

A

super conductors

B

alkali metals

C

transition metals

D

Ferrites

General ScienceEasyMagnetism

14.

Example for dia-magnetic materials

A

super conductors

B

alkali metals

C

transition metals

D

Ferrites

General ScienceEasyMagnetism

15.

Magnetic field strength units are

A

weber per meter square

B

Wb / A.m

C

A / m

D

Tesla / m

General ScienceEasyMagnetism

16.

Magnetic permeability has units as

A

Tesla

B

Henry

C

Tesla / m

D

Henry / m

General ScienceEasyMagnetism

17.

Magnetic permeability has units as

A

weber per meter square

B

Wb / A.m

C

A / m

D

Tesla / m

General ScienceEasyMagnetism

18.

Units for magnetic flux density is

A

weber per meter square

B

Wb / A.m

C

A / m

D

Tesla / m

General ScienceEasyMagnetism

19.

Basic source of magnetism is

A

Charged particles alone

B

Movement of charged particles

C

Magnetic dipoles

D

Magnetic domains

Magnetism in General Science : Practice MCQ Questions & Answers with Explanations