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Heat and Thermodynamics question

2023 · 31 Jan · Shift 2 · Q63
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Heat and Thermodynamics question

2023 · 31 Jan · Shift 2 · Q63

JEE MainPhysicsHeat and ThermodynamicsNumerical+4 / −1
A water heater of power 2000 W2000 \mathrm{~W}2000 W is used to heat water. The specific heat capacity of water is 4200 Jkg−1 K−14200 \mathrm{~J}\mathrm{kg}^{-1} \mathrm{~K}^{-1}4200 Jkg−1 K−1. The efficiency of heater is 70%70 \%70%. Time required to heat 2 kg2 \mathrm{~kg}2 kg of water from 10∘C10^{\circ} \mathrm{C}10∘C to 60∘C60^{\circ} \mathrm{C}60∘C is ‾\underline{\hspace{2cm}}​ s. (Assume that the specific heat capacity of water remains constant over the temperature range of the water).
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