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NEET2020PhysicsThermal Properties of MatterActual

The quantities of heat required to raise the temperature of two solid copper spheres of radii r 1 and r 2 r 1 = 1.5   r 2 through 1   K are in the ratio:

Options

  1. A9 4
  2. B3 2
  3. C5 3
  4. D27 8

Correct answer

D. 27 8

Step-by-step solution

Heat supplied Δ Q = M s Δ T For same material ' s ' same. Δ Q ∝ M and M = 4 3 π r 3 ρ Δ Q ∝ r 3 Δ Q 1 Δ Q 2 = r 1 r 2 3 = 1 . 5 1 3 = 27 8

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