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Standard XII
Physics
Carnot Cycle
The coefficie...
Question
The coefficient of performance of refrigerator, whose efficiency 25% is
A
1
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B
3
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C
5
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D
7
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Solution
The correct option is
C
3
The relation between coefficient of performance and efficiency is :
C
.
O
.
P
=
1
−
η
η
(
η
−
e
f
f
i
c
i
e
n
c
y
)
given
η
=
0.25
⇒
C
.
O
.
P
=
1
−
0.25
0.25
=
0.75
0.25
=
3
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