Observe the following figure:
If the current in the coil A is changed, will some current be induced in the coil B? Explain.
A current will be induced in Coil B. When there is a change in the current in Coil A, a magnetic field is associated with it. This induces a potential difference between the two coils which gives rise to a current in Coil B. This change can be noted by observing the deflection in the galvanometer.