Electromagnetism – Online MCQs – Physics 10th

1. In the MKS system, the unit of magnetic flux density is:

2. Transformers are used to:

3. Fleming’s left-hand rule is used to find:

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

5. 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:

6. As per Michael Faraday, the force is increased if the:

7. We apply Lenz’s law to find out the direction of:

8. Electric motors work on the principle of:

9. The turn ratio of a transformer is 10. It means:

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

11. There are _________ fundamental forces in nature.

12. It is responsible for forcing positively charged atomic nuclei to attract negatively charged electrons.

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

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

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

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

17. A magnetic field:

18. A D.C motor converts:

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

20. When a coil rotated in a magnetic field the induced current in it: