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A scientist says that the efficiency of ...

A scientist says that the efficiency of his heat engine which operates at source temperature `127^(@)C` and sink temperature `27^(@)C` is `26%`, then

A

It is impossible

B

It is possible but less probable

C

It is quite probable

D

Data are incomplete

Text Solution

Verified by Experts

The correct Answer is:
A
`eta_(max)=1-(T_2)/(T_1)=1-300/400 = 1/4 = 25%`
so `26%` effciency is impossible.
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Knowledge Check

  • A scientist says that the efficiency of his heat engine which works at source temperature 127^@C and sink temperature 27^@C is 26\%, then

    A
    It is impossible
    B
    It is possible but less probable
    C
    It is quite probable
    D
    Date are incomplete

  • If a Carnot’s engine functions at source temperature 127^(@)C and at sink temperature 87^(@)C , what is its efficiency

    A
    0.1
    B
    0.25
    C
    0.4
    D
    0.5

  • The efficiency of a Carnot engine operating between temperatures of 100^(@)C and -23^(@)C will be

    A
    `(100 - 23)/(273)`
    B
    `(100 + 23)/(373)`
    C
    `(100 + 23)/(100)`
    D
    `(100 - 23)/(100)`

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