Q 11-01-159JEE MainJEE Main 2022 (25 Jul, Shift 2)Easy
The maximum errors in the measurement of resistance, current and time for which current flows in an electrical circuit are $1\%$, $2\%$ and $3\%$ respectively. The maximum percentage error in the detection of the dissipated heat will be:
Answer: (D) 8
$H = I^2Rt$, so
$$\frac{\Delta H}{H}\times100 = 2(2\%) + 1\% + 3\% = 8\%$$
Solution by Sreeraj P, M.Sc Physics