Cost of maintenance of Wheatstone bridge is _________ A. low

cost-of-maintenance-of-wheatstone-bridge-is-a-low

Cost of maintenance of Wheatstone bridge is _________

A. low

B. high

C. depends on the components

D. depends on the source e.m.f

I had been asked this question in an interview.

The origin of the question is Limitations of Wheatstone Bridge topic in section Measurement of Resistance of Electrical Measurements

The correct answer is B. high

To elaborate: As the resistance must have a tolerance of upto 1%, cost of maintenance of the Wheatstone bridge circuit is expensive. Voltage source does not add to the cost of maintenance of a Wheatstone bridge as it is uniform for all bridge circuits.