Electromagnetism – Online MCQs – Physics 10th

1. The direction of induced current in a circuit is always such that it opposes the cause that produces it. This law was presented by:

2. Two parallel wires carrying currents in opposite directions:

3. A current carrying coil kept in a magnetic field experiences a torque which is zero when the:

4. The direction of induced e.m.f. in a circuit is in accordance with the conservation of:

5. To increase or decrease AC voltages, we use:

6. A conductor of length L has current I passing through it when it is placed parallel to a magnetic field. The force experienced by the conductor will be:

7. If the secondary voltage exceeds the primary voltage, the transformer is called a:

8. The force F acting on the particle is directly proportional to the

9. There are _________ fundamental forces in nature.

10. The induced emf of a coil is directly proportional to:

11. Tesla is a unit of:

12. The earth’s magnetic field is:

13. Magnetic effect of current is called:

14. The power is transmitted over long distances with high voltage to:

15. The force that attracts matter across long distances.

16. Which statement is true about the magnetic poles?

17. Which statement is NOT TRUE for transformers?

18. When a magnet is in motion relative to a coil the induced e.m.f. does not depend upon:

19. An ideal transformer dissipates by itself:

20. The number of coils in a transformer is: