Physics
Complete the following sentence —
The current is induced in a closed circuit only if there is _ .
Related Questions
Assertion (A): The magnitude of induced e.m.f. becomes maximum when the magnetic flux linked with the coil reduces to zero from its maximum value.
Reason (R): This happens when the plane of the coil lies in the direction of the magnetic field.
- Both A and R are true and R is the correct explanation of A.
- Both A and R are true and R is not the correct explanation of A.
- assertion is false but reason is true.
- assertion is true but reason is false.
(a) What kind of the energy change takes place when a magnet is moved towards a coil having a galvanometer between it's ends?
(b) Name the phenomenon.
In which of the following cases e.m.f. is induced?
(i) A current is started in a wire held near a loop of wire.
(ii) The current is switched off in a wire held near a loop of wire.
(iii) A magnet is moved through a loop of wire.
(iv) A loop of wire is held near a magnet.
A conductor is moved in a varying magnetic field. Name the law which determines the direction of current induced in the conductor.