Q.

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» B. headphones and tunable amplifiers.
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