In a single phase power factor meter the phase difference between the currents in the two pressure coils is$?

In a single phase power factor meter the phase difference between the

1.	In a single phase power factor meter the phase difference between the currents in the two pressure coils is$?
A.	exactly 0¬¨‚àû
B.	approximately 0¬¨‚àû
C.	exactly 90¬¨‚àû
D.	approximately 90¬¨‚àû
Answer» D. approximately 90¬¨‚àû