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A Wheatstone bridge may not give accurate readings if _________

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in Electrical Measurements by (148k points)
A Wheatstone bridge may not give accurate readings if _________

(a) it is not balanced

(b) it is balanced

(c) the voltage drop across the circuit is maximum

(d) excessive current flows through the circuit

I got this question in an online quiz.

Question is from Limitations of Wheatstone Bridge topic in division Measurement of Resistance of Electrical Measurements

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Right option is (a) it is not balanced

To explain: A Wheatstone bridge circuit may give inaccurate measurement of resistance if it is not balanced properly. Current flow through a Wheatstone bridge circuit is fixed as the e.m.f source magnitude is constant.

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