NEET UG PHYSICS MCQ: THERMODYNAMICS

1 Medium

1 of 1

Application +4 | -1

Calculate the time required to heat

20 \mathrm{~kg}

of water from

10^{\circ} \mathrm{C}

35^{\circ} \mathrm{C}

using an immersion heater rated

1000 \mathrm{~W}

. Assume that

80 \%

of the power input is used to heat the water. Specific heat capacity of water

=4200 \mathrm{~J} \mathrm{~kg}^{-1} \mathrm{~K}^{-1}

View answer and explanation

Correct option: B

44 min

Option B (44 min) is correct because it accurately calculates the time required based on the power, efficiency, mass, specific heat, and temperature change.

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