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

Answer:

The correct option is c) magnetic effect of current.

Explanation:

A micro circuit breaker (MCB) works faster and more efficiently than a fuse to stop excessive current flow. When heated, an MCB’s bimetallic strip bends, activating a mechanical latch that opens the tiny circuit, cutting off current.