Take a soft iron bar. With the help of insulated copper wire make two separate coils as shown in fig. To one coil connect a battery with a key. To another coil connect a galvanometer. Press the key. Do you observe deflection in the galvanometer? What happen when the key is opened?

When primary coil P is moved towards secondary coil S (as shown in the Fig.) the galvanometer shows momentary deflection. What can be done to have larger deflection in the galvanometer with the same battery?

A coil of insulated copper wire is connected to a galvanometer, what will happen if a bar magnet is Withdrawn from inside the coil.

A coil of insulated copper wire is connected to a galvanometer what will happen if a bar magnet is held stationary in the coil?

A coil of insulated copper wire is connected to a galvanometer, what will happen if a bar magnet is pushed into the coil

Two tangent galvanometers have circular coils of same radii differing only in the number of turns. They are connected in series. WHen a a steady current is passed in the circuit, the mean deflections of galvanometer are theta_1 and theta_2 . deduce an expression for the ratio of number of turns of the galvanometer.