engineering recuitment PGCIL Trainee Supervisor Electrical Mock Test 2024 Electrical and Electronics Measurements Potentiometers
To measure an A. C. voltage by using an A.C. potentiometer, it is desirable that the supply for the potentiometer in taken
1
From a source which is not the same as the unknown voltage
2
From a battery
3
From the same source as the unknown voltage
4
Any of the above