Q 11-11-130JEE MainJEE Main 2021 (26 Aug, Shift 2)Medium
A refrigerator consumes an average $35$ W power to operate between temperature $-10^\circ$C to $25^\circ$C. If there is no loss of energy then how much average heat per second does it transfer?
Answer: (C) $263$ J s$^{-1}$
For an ideal refrigerator, $\dfrac{Q_2}{W} = \dfrac{T_2}{T_1 - T_2} = \dfrac{263}{35}$.
Heat removed per second from the cold side: $Q_2 = 35\times\dfrac{263}{35} = 263$ J s$^{-1}$.
Solution by Sreeraj P, M.Sc Physics