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Balance equation for computing the unknown resistance is?(a) Rx = \(\frac{R_2}{R_1}\)(b) Rx = \(\frac{R_2 R_3}{R_1}\)(c) Rx = \(\frac{R_3}{R_1}\)(d) Rx = \(\frac{1}{R_1}\)The question was asked in an online interview.I need to ask this question from Maxwell’s Inductance Capacitance Bridge topic in portion Measurement of Inductance and Capacitance of Electrical Measurements

Answer»

Right answer is (b) RX = \(\frac{R_2 R_3}{R_1}\)

For explanation I would say: The BALANCE condition for determining the value of the UNKNOWN RESISTANCE is given by the relation Rx = \(\frac{R_2 R_3}{R_1}\)

where, R1 and R3 are variable resistances and R2 is a fixed resistance.



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