NCERT Class 12 Chapter 5 Physics Continuity and Differentiability MCQs Quiz 1

1. Which of the following materials is used to make permanent magnets?

Copper

Aluminum

Iron

Tungsten

2. Magnetic susceptibility is defined as the ratio of magnetization (M) to which quantity?

Magnetic flux

Magnetic moment

Magnetic field (H)

Magnetic potential

3. The magnetic moment of a current loop depends on:

The charge passing through the loop

The shape of the loop

The current and the area of the loop

The speed of current flow

4. Which of the following is a unit of the magnetic field?

Tesla

Ampere

Coulomb

Volt

5. The Earth’s magnetic field is due to:

The presence of large iron deposits

Electric currents circulating in the core

The magnetic properties of the atmosphere

Its gravitational field

6. A bar magnet is cut into two equal halves along its length. What happens to the magnetic moment of each piece?

It becomes zero

It is doubled

It remains the same

It is halved

7. The angle of dip at the magnetic poles of the Earth is:

0

45

90

180

8. Which of the following is not a ferromagnetic material?

Nickel

Cobalt

Iron

Copper

9. Diamagnetic materials are characterized by:

Strong attraction to a magnetic field

Slight repulsion from a magnetic field

Alignment of their dipoles in the direction of the magnetic field

Permanent magnetic dipoles

10. The horizontal component of Earth’s magnetic field is zero at:

The equator

The magnetic poles

45° latitude

60° latitude

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