Electromagnetism – Online MCQs – Physics 10th

1. When current flowing upward direction it indicated the:

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

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

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

5. An ideal transformer dissipates by itself:

6. A D.C motor converts:

7. In the transformer, if the secondary voltage is more than the primary voltage then it is called:

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

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

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

11. 1 Tesla = _________________

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

13. The force that attracts matter across long distances.

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

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

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

17. Tesla is a unit of:

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

19. Electric motors work on the principle of:

20. Magnetic effect of current is called: