A bridge circuit works at a frequency of 2KHz, the following can be used as detectors for detection of null conditions in the bridge:

vibration galvanometers and tunable amplifiers.

vibration galvanometers and headphones

headphones and tunable amplifiers.

vibration galvanometers, headphones and tunable amplifiers.

A bridge circuit works at a frequency of 2KHz, the following can be us

1.	A bridge circuit works at a frequency of 2KHz, the following can be used as detectors for detection of null conditions in the bridge:
A.	vibration galvanometers and headphones
B.	headphones and tunable amplifiers.
C.	vibration galvanometers and tunable amplifiers.
D.	vibration galvanometers, headphones and tunable amplifiers.
Answer» C. vibration galvanometers and tunable amplifiers.