Electromagnetism – Online MCQs – Physics 10th

1. 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:

2. Which part of a D.C motor reverses the direction of current through the coil every half-cycle?

3. If we increase the number of loops, the turning effect of a coil would be:

4. When the plane of the coil is perpendicular to magnetic field, the induced e.m.f is:

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

6. The magnetic field around a magnetic moving charge is a:

7. Transformers are used to:

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

9. In a transformer, the primary coil is connected to:

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

11. An AC generator is an electric generator that converts:

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

13. The magnetic force experienced by a charged particle moving in a magnetic field will be minimum when it moves:

14. Tesla is equivalent to one:

15. The force that attracts matter across long distances.

16. When electric charges are at rest, they exert:

17. At the generating station, the AC voltage is:

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

19. If the secondary voltage is lower than the primary voltage, the transformer is called a:

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