An electric bulb works on which of the following principles:
Magnetic effect of electric current
Heating effect of electric current
Chemical effect of electric current
Both A and B
In a bulb, the filament gets heated up and starts glowing. So it makes use of the heating effect of current.
An MCB which cuts off the electricity supply in case of short-circuiting or overloading works on the :
(a) chemical effect of current
(b) heating effect of current
(c) magnetic effect of current (d) electroplating effect of current