A coil made of insulated copper wire is connected to a galvanometer. What will happen if a bar magnet is withdrawn from inside the coil ?

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Solution

When magnet completely inside the but stationary, the no current flow through the circuit. The galvanometer show no deflection. If bar magnet is withdrawn from the inside the coil, The galvanometer show sudden deflection indicating that a current is induced in the coil. The galvanometer deflection is temporary.

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