(a) Heating effect- When an electric current is passed through a bulb, its filament gets heated to a high temperature and bulb starts glowing. The resulting effect is heating effect of current.
(b) Chemical effect- When an electric current is passed through a conducting solution, it causes chemical reactions. The resulting effect is called chemical effect of current.
(c) Magnetic effect- Whenever an electric current is passed through a circuit, a magnetic field is produced around it. The resulting effect is magnetic effect of current.
Thus, an electric current produces heating, chemical and magnetic effects.