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AP EAMCET2011PhysicsThermodynamics

A reversible engine converts one-sixth of the heat supplied into work. When the temperature of the sink is reduced by 62^ C , the efficiency of the engine is doubled. The temperatures of the source and sink are

Options

  1. A99^ C , 37^ C
  2. B80^ C , 37^ C
  3. C95^ C , 37^ C
  4. D90^ C , 37^ C

Correct answer

A. 99^ C , 37^ C

Step-by-step solution

The efficiency of engine, = T₁-T₂ T₁ According to question, 2 = T₁- (T₂-62 ) T₁ or 1 2 = T₁-T₂ (T₁-T₂ )+62 or 62= (T₁-T₂ ) Only option (a) satisfies the condition.

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