The heat developed on passing an electric current of 1.0 A through a wire of resistance 15 Ω in 1 minute will be:
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → 900J
By Joule's law of heating the heat developed in a resistor is \( H = I^{2}Rt \), with the time in seconds.
\( t = 1\,\mathrm{min} = 60\,\mathrm{s} \)
\( H = (1.0\,\mathrm{A})^{2}\times15\,\Omega\times60\,\mathrm{s} = 900\,\mathrm{J} \)