Q 12-03-137JEE MainJEE Main 2023 (11 Apr, Shift 1)Easy
Two identical heater filaments are connected first in parallel and then in series. At the same applied voltage, the ratio of heat produced in same time for parallel to series will be
Answer: (B) $4:1$
$H=\dfrac{V^2t}{R}$. Parallel: $\dfrac R2$; series: $2R$. Ratio $=\dfrac{2R}{R/2}=4:1$.
Solution by Sreeraj P, M.Sc Physics