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If P/Q=1, unknown resistance S=1000Ω and R could be varied from 0 to 100Ω then the bridge could be ___________(a) A balanced circuit(b) A rectified circuit(c) An unbalanced circuit(d) An identical circuitThis question was addressed to me in an online interview.Enquiry is from Measuring Resistance the Wheatstone Bridge and Delta-to-Wye (Pi-to-Tee) Equivalent Circuits topic in section Simple Resistive Circuits of Electric Circuits

Answer»

Correct option is (c) An unbalanced CIRCUIT

Best EXPLANATION: P/Q=R/S. If P/Q=1 then according to GIVEN range of R and S, the bridge circuit could never be a balanced ONE.



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