A reversible engine has ideal thermal efficiency of 30%. When it is used as a refrigerating machine with all other conditions unchanged, the coefficient of performance will be
a) 1.33
b) 2.33
c) 3.33
d) 4.33
A reversible engine has ideal thermal efficiency of 30%. When it is used as a refrigerating machine with all other conditions unchanged, the coefficient of performance will be
a) 1.33
b) 2.33
c) 3.33
d) 4.33