Which of the following instruments can be used in ac bridges for low frequencies up to 200 Hz only?
A. head phone
B. tunable amplifier
C. vibration galvanometer
D. all of the above.
Answer:C
Which of the following instruments can be used in ac bridges for low frequencies up to 200 Hz only?
A. head phone B. tunable amplifier C. vibration galvanometer D. all of the above.