To measure an A. C. voltage by using an A.C. potentiometer, it is desirable that the supply for the potentiometer in taken
A. from a source which is not the same as the unknown voltage
B. from a battery
C. from the same source as the unknown voltage
D. any of the above
Answer:C
To measure an A. C. voltage by using an A.C. potentiometer, it is desirable that the supply for the potentiometer in taken
A. from a source which is not the same as the unknown voltage B. from a battery C. from the same source as the unknown voltage D. any of the above