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Why a Wheatstone bridge can’t be used for signal conditioning?

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Why a Wheatstone bridge can’t be used for signal conditioning?

(a) due to the galvanometer

(b) due to excessive current flow

(c) due to the e.m.f source used

(d) due to lead wires

I got this question in an online quiz.

The above asked question is from Limitations of Wheatstone Bridge topic in chapter Measurement of Resistance of Electrical Measurements

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Correct choice is (d) due to lead wires

To elaborate: Lead wires add to the resistance of the arms of the Wheatstone bridge. As a result the bridge circuit is destabilized and can’t be used for signal conditioning.

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