Moving Charges and Magnetism TEST 2

 Moving Charges and Magnetism 

Section A: Multiple Choice Questions Choose the correct option for each question.

1. Which of the following statements is true regarding a magnetic field? a) It is a scalar quantity. b) It is a vector quantity. c) It has both scalar and vector components. d) It depends on the direction of the current.

2. The force experienced by a charged particle moving in a magnetic field is maximum when: a) The velocity of the particle is parallel to the magnetic field. b) The velocity of the particle is perpendicular to the magnetic field. c) The velocity of the particle is antiparallel to the magnetic field. d) The velocity of the particle is zero.

3. Ampere's circuital law is a mathematical expression of: a) Faraday's law of electromagnetic induction. b) Lenz's law. c) Gauss's law for magnetism. d) Biot-Savart's law.

4. Which of the following materials is paramagnetic? a) Iron b) Copper c) Aluminum d) Wood

5. The magnetic field inside a solenoid can be increased by: a) Decreasing the number of turns. b) Decreasing the current. c) Increasing the length of the solenoid. d) Increasing the number of turns.

Section B: Short Answer Questions Answer the following questions briefly.

6. State the right-hand thumb rule for determining the direction of a magnetic field around a current-carrying conductor.

7. Define the magnetic dipole moment of a current loop.

8. Explain the working principle of an AC generator.

9. State Faraday's laws of electromagnetic induction.

10. How can you demagnetize a magnet?

Section C: Long Answer Questions Answer any two of the following questions in detail.

11. Explain the construction and working principle of a cyclotron.

12. Derive an expression for the magnetic field at the center of a circular loop carrying current.

13. Discuss the applications of electromagnetic induction in daily life.