Question

a coil of insulated copper wire is connected to a galvanometer what will happen if a bar magnet is pushed into the coil withdrawn from inside the cold held stationary inside the coil

Answer 1

HEY DEAR ...

(i) (a) When a
bar magnet is pushed into the coil of insulated copper wire connected to a galvanometer,
an induced current is set-up in the coil due to change of magnetic field through it. As
a result, galvanometer gives a deflection (say towards left).

(b)  When the bar
magnet is withdrawn from inside the coil, again an induced current is set­up in the
coil due to change of magnetic field through it. As a result galvanometer gives
a deflection in the reverse direction. (say towards right).

(c)  If the bar magnet is held
stationary inside the coil, then there is no induced current in the coil,
because there is no change in magnetic field through it. As a result,
galvanometer does not show any deflection.                   

HOPE , IT HELPS ...

Answer 2

Explanation:

(i) The needle of the galvanometer shows a momentary deflection in a particular direction.

(ii) The needle of the galvanometer shows a momentarily in the opposite direction.

(iii) The needle of the galvanometer shows no deflection.