A fuse wire of resistance is connected in series with a heating element across a DC supply

PHYSICS · Subjective · CBSE · Physics · Electricity · Electricity

Problem

A fuse wire of resistance

0.20\,\Omega

is connected in series with a

10\,\Omega

heating element across a

230\,\text{V}

DC supply. The fuse melts after absorbing

20\,\text{J}

of energy. Determine the maximum time for which current can flow before the fuse melts.