Question

name the device used to protect the electric circuit from over loading and short circuit .On what effect of current does it work ?​

Answer 1

Fuse is the electric device used to protect the electric circuit from over loading and short circuit.

It works on heating effect of electric current

During short circuit and overloading, huge amount of current is drawn causing large amount of heat generation which may result in fire. When more than a fixed amount of current passes through the circuit, the fuse (through which current goes) starts to heat up and eventually melts, thus breaking the circuit. Since the circuit breaks. current stops flowing in the circuit, preventing accidents.

Answer 2

Answer:

(i) Fuse is used to protect the electric circuit from over loading and short circuit.

It is a safety device. It has low melting point and low resistivity.

(ii) It work on the principle heating effects of electric current.