Electricity and Magnetism MCQs

1. The unit of electric current is:
(A) Coulomb
(B) Volt
(C) Ohm
(D) Ampere

2. Which of the following is a good conductor of electricity?
(A) Wood
(B) Rubber
(C) Copper
(D) Plastic

3. The force between two charged objects depends on:
(A) The charges and the distance between them
(B) The temperature of the objects
(C) The color of the objects
(D) The material of the objects

4. The relationship between current (I), voltage (V), and resistance (R) is given by:
(A) Faraday’s Law
(B) Ohm’s Law
(C) Coulomb’s Law
(D) Ampere’s Law

5. Which of the following materials is most commonly used in the core of an electromagnet?
(A) Copper
(B) Aluminum
(C) Iron
(D) Plastic

6. The magnetic field around a current-carrying conductor forms:
(A) A straight line
(B) A circular loop
(C) A triangular shape
(D) A parallel line

7. Which of the following is the unit of electric potential difference?
(A) Ampere
(B) Ohm
(C) Watt
(D) Volt

8. The force between two magnetic poles is directly proportional to:
(A) The square of the distance between them
(B) The product of the magnetic forces
(C) The distance between them
(D) The square of the product of the charges

9. The magnetic field produced by a current-carrying wire can be detected using:
(A) A galvanometer
(B) A voltmeter
(C) A compass
(D) A thermometer

10. The SI unit of electric resistance is:
(A) Volt
(B) Ampere
(C) Ohm
(D) Joule