An electric fuse works on the :
- AHeating effect of current
- BChemical effect of current
- CMagnetic effect of current
- DMore than one of the above
- ENone of the above
Show answer and explanation
Correct answer: (a) Heating effect of current
Explanation
A fuse works on the heating effect of current: the heat produced is H = I²Rt. When the current rises above the safe limit, the fuse wire gets hot enough to melt, breaking the circuit.