For a regenerator, coefficient of performance is given by (Q1 is the heat taken from low temperature region and Q2 is the heat given to high temperature region)

For a regenerator, coefficient of performance is given by (Q1 is the h

1.	For a regenerator, coefficient of performance is given by (Q1 is the heat taken from low temperature region and Q2 is the heat given to high temperature region)
A.	Q1/(Q1-Q2)
B.	Q2/(Q1-Q2)
C.	1- (Q1/Q2)
D.	1- (Q2/Q1)
Answer» C. 1- (Q1/Q2)