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Question 30853
JEE Physics · Hard

Elasticity, Thermal Expansion, Calorimetry and Heat Transfer: Specific Heat MCQ

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Specific HeatHardQuestion 30853

Question

A 500 W heater raises temperature of 2 kg water from 20°C to 70°C (c = 4200 J/kg·K). Time taken is:
  1. A
    420 s
  2. B
    210 s
  3. C
    840 s
    Correct
  4. D
    630 s

Correct answer

840 s

Explanation

Q = mcΔT = 2 × 4200 × 50 = 420,000 J. Time = Q/P = 420000/500 = 840 s.

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