Electromagnetism – Online MCQs – Physics 10th

1. When a current passes through a conductor, it produces:

2. An ideal transformer dissipates by itself:

3. Tesla is a unit of:

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

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

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

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

8. The magnetic field direction around a current-carrying conductor can be determined using the Flemings

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

10. If we had a wire with the right hand such that the thumb pointed in the direction of the current, then the curling fingers of the hand will point the:

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

12. A current carrying coil kept in a magnetic field, experiences a torque, which is the:

13. The step-up transformer:

14. The electric power delivered to the secondary circuit is equal to the power supplied to the primary circuit is a/an:

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

16. The magnetic field is the strongest:

17. Electric motors work on the principle of:

18. Two parallel wires carrying currents in opposite directions:

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

20. A practical application of mutual induction is called: