Discuss Faraday's experiment of two coils for generation of electric current in coil.

Explanation

In figure two coils `C_1` and `C_2` are shown. Coil `C_1` is connected with galvanometer G and coil `C_2` is connected with a battery.

The steady current in the coil `C_2` produces a steady magnetic field. As coil `C_2` is moved towards the coil `C_1`, the galvanometer shows deflection. This indicates that electric current is induced in coil `C_1`.
When `C_2` is moved away, the galvanometer shows a deflection again, but this time in the opposite direction.
The deflection lasts as long as coil `C_2` is in motion.
When the coil `C_2` is kept stationary and `C_1` is moved, the same effects are observed. Again, it is the relative motion between the coils that induces the electric current.