NCERT Class 12 Chapter 4 Physics Moving Charges and Magnetism MCQs Quiz - 2

1. What is the force experienced by a charge moving in a magnetic field proportional to?

Charge and velocity of the particle

Charge only

Velocity only

Mass and velocity of the particle

2. In a cyclotron, which of the following particles can be accelerated?

Protons

Electrons

Alpha particles

All of the above

3. The angle between the velocity of a charged particle and the magnetic field direction that gives zero magnetic force is:

0°

90°

45°

180°

4. Which of the following is a characteristic of magnetic field lines?

They can cross each other

They are continuous loops

They are straight lines

They repel each other

5. A charged particle moves through a uniform magnetic field. What will happen to its kinetic energy?

It will increase

It will decrease

It will remain constant

It will become zero

6. The direction of the magnetic field around a straight conductor carrying current is given by:

Right-Hand Rule

Left-Hand Rule

Ampere's Law

Biot-Savart Law

7. If the magnetic field in a region is increased, the induced current in a closed loop will flow in:

The same direction

Opposite direction

Random direction

No current flows

8. What is the relationship between the magnetic field (B) and the current (I) in a solenoid?

B ∝ I

B ∝ I²

B ∝ 1/I

B is independent of I

9. The magnetic field inside a long straight solenoid is:

Uniform and zero

Non-uniform and zero

Uniform and non-zero

Non-uniform and non-zero

10. A loop of wire is placed in a magnetic field. If the magnetic field strength is increased, what happens to the induced emf?

It remains constant

It decreases

It increases

It becomes zero

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