Chapter Exam

Chapter 8: Magnetism and Matter — Online MCQ Test

Q: Magnetic field lines outside a bar magnet emerge from which pole and enter which pole?

Answer: B. North pole to south pole — Outside a magnet, magnetic field lines go from the north pole to the south pole. Inside the magnet, they complete the closed loop in the opposite direction.

Q: A magnetic dipole moment of a bar magnet is given by:

Answer: A. Pole strength × distance between poles — The magnetic dipole moment of a bar magnet is the product of pole strength and magnetic length, i.e., the distance between the poles.

Q: A certain material is weakly attracted by a magnet, has small positive susceptibility, and does not retain magnetization when the field is removed. Which is the best classification?

Answer: B. Paramagnetic — Weak attraction and small positive susceptibility are typical of paramagnetic substances. They lose magnetization once the external field is removed.

PHYSICS · CLASS 12 INTERMEDIATE 2 YEAR · Telangana State Board

Practice Chapter 8: Magnetism and Matter with a free chapter-wise online MCQ test for Telangana State Board CLASS 12 INTERMEDIATE 2 YEAR PHYSICS. This chapter covers: This chapter covers bar magnets as magnetic dipoles magnetic field lines Gauss Law in magnetism Earth magnetic field and magnetic properties of materials diamagnetic paramagnetic f.... AI-generated questions from basic to board-exam level, with instant results and explanations.

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Chapter 8: Magnetism and Matter — Important Questions & Answers (FAQ)

Frequently asked questions from Telangana State Board CLASS 12 INTERMEDIATE 2 YEAR PHYSICS — Chapter 8: Magnetism and Matter, with answers and explanations. These are sample questions; the exam has its own separate question set.

What is the nature of a bar magnet in terms of magnetic poles?

A. It has only a north pole
B. It has only a south pole
C. It behaves like a magnetic dipole with both north and south poles ✓
D. It has no magnetic poles

Answer: C. It behaves like a magnetic dipole with both north and south poles
A bar magnet always behaves as a magnetic dipole. If it is cut into pieces, each piece still has both north and south poles.

Magnetic field lines outside a bar magnet emerge from which pole and enter which pole?

A. South pole to north pole
B. North pole to south pole ✓
C. North pole to north pole
D. South pole to south pole

Answer: B. North pole to south pole
Outside a magnet, magnetic field lines go from the north pole to the south pole. Inside the magnet, they complete the closed loop in the opposite direction.

A magnetic dipole moment of a bar magnet is given by:

A. Pole strength × distance between poles ✓
B. Mass × acceleration
C. Charge × velocity
D. Current × resistance

Answer: A. Pole strength × distance between poles
The magnetic dipole moment of a bar magnet is the product of pole strength and magnetic length, i.e., the distance between the poles.

A magnetic field line never crosses another field line because:

A. Magnetic fields are always uniform
B. A point cannot have two different directions of magnetic field simultaneously ✓
C. Field lines are imaginary and cannot intersect
D. Magnetic poles repel field lines

Answer: B. A point cannot have two different directions of magnetic field simultaneously
If two field lines crossed, the magnetic field at that point would have two directions, which is impossible. Hence field lines never intersect.

A certain material is weakly attracted by a magnet, has small positive susceptibility, and does not retain magnetization when the field is removed. Which is the best classification?

A. Diamagnetic
B. Paramagnetic ✓
C. Ferromagnetic
D. Antiferromagnetic

Answer: B. Paramagnetic
Weak attraction and small positive susceptibility are typical of paramagnetic substances. They lose magnetization once the external field is removed.

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