A water heater of power 2000 ~W is used to heat water. The specific heat capacity of water is 4200 ~J kg⁻¹ ~K⁻¹. The efficiency of heater is 70%. Time required to heat 2 ~kg of water from 10^(°) C to 60^(°) C is _ _ _ _ s. (Assume that the specific heat capacity of water remains constant over the temperature range of the water).

Thermodynamics: JEE Main 2023 Physics question

JEE Main 2023 · 31 Jan, Evening shift · Q72

JEE Main 202331 Jan, Evening shiftPhysicsHardThermodynamics163× since 2002

A water heater of power

2000 \mathrm{~W}

is used to heat water. The specific heat capacity of water is

4200 \mathrm{~J}

\mathrm{kg}^{-1} \mathrm{~K}^{-1}

. The efficiency of heater is

70 \%

. Time required to heat

2 \mathrm{~kg}

of water from

10^{\circ} \mathrm{C}

60^{\circ} \mathrm{C}

is _________ s. (Assume that the specific heat capacity of water remains constant over the temperature range of the water).

Your answerType your answer. Integers and decimals are accepted.

JEE Main 2023 Thermodynamics Question with Answer (31 Jan Evening shift, Q72) | JEE Arc