Question

Two coils are taken. first one is connected to the battery and the second one is connected to a galvanometre. when u change the polarity of the battery rapidly. the galvanometre gives a deflection in left and right alternatively. why??​

Answer 1

When key is closed galvanometer will show a momentary deflection due to produce of induced current due to change in magnetic field lines .

And when key is opened again a momentary deflection will be seen but at opposite direction due to again a change in magnetic fields.

Answer 2

Answer:

when key is closed to the galvano meter will show a momentar deflection due to produce of induced current due to change in the magnetic field lines

and when key is opened against a momentary deflection will be but at opposite direction due to again a charge in the magnetic field.

Hope it will help you dear.and make me branily