JOSEPH HENRY ( – ) moved towards the coil C , the galvanometer shows a deflection. This indicates that electric current is induced in coil C . When C is moved away, the galvanometer shows a deflection again, but this time in the opposite direction. The deflection lasts as long as coil C is in motion.
When the coil C is held fixed and C is moved, the same effects are observed. Again, it is the relative motion between the coils that induces the electric current .