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(A) Efficiency of a reversible ingine is...

(A) Efficiency of a reversible ingine is 100% (maximum) when the temperature of sink is `-273^(@)C`.
(R) Efficiency of engine `eta=(T_(2)-T_(1))/(T_(2))`

A

If both (A) and (R) are correct and (R) is the correct explanation for (A).

B

If both (A) and (R) are correct but (R) is not the correct explanation for (A).

C

If (A) is correct but (R) is incorrect

D

If (A) is incorrect but (R) is correct.

Text Solution

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The correct Answer is:
A
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Knowledge Check

  • Efficiency of a Carnot's engine is 100% when

    A
    sing is at`0^(@)C`
    B
    sink is at 0K
    C
    source is at `273^(@)C`
    D
    source is at `100^(@)C`

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

    A
    `99^(@)C, 27^(@)C`
    B
    `80^(@)C, 37^(@)C`
    C
    `95^(@)C, 37^(@)C`
    D
    `90^(@)C, 37^(@)C`

  • The efficiency of carnot's heat engine is 0.5 when the temperature of the source is T_(1) and that of sink is T_(2) .The efficiency of another crot's heat engine is also 0.5.the temperature of source and sink of the second engine are respecitvely

    A
    `2T_(1),2T_(2)`
    B
    `2T_(1),(T_(2))/(2)`
    C
    `T_(1)+5,T_(2)-5`
    D
    `T_(1)+10,T_(2)-10`

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