Question

Whenever there is an excessive flow of current in a household circuit:

• A. One of the appliances acts as a fuse and protect other appliances from the excess current.
• B. A tap switch passes this excess current to a bulb.
• C. An MCB breaks the circuit, and protects all the appliances connected to the circuit.
• D. The wiring in the circuit protects the appliance from this excess current.

Answer 1

The correct option is C

An MCB breaks the circuit, and protects all the appliances connected to the circuit.

Nowadays, MCB (Miniature Circuit Breaker) is used instead of safety fuse in houses. This particular device breaks a circuit whenever there is an excessive flow of current through mains, and hence protects all the home appliances.