Wheatstone a-c bridge with R1 = 1000 ohms, R2 = 2000 ohms, R3 = 100 ohms, and L3 = 500 mH. If the circuit is excited by 5-V rms, frequency 1-kHz, determine the voltage at L4=510 mH

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Wheatstone Bridge Method

A Wheatstone bridge is a circuit used to measure unknown resistance by measuring the ratios of the two branches of the circuit such that each branch has two resistance and out of four resistance one is unknown. The two branches are joined in between with the help of galvanometer which is used to determine the direction of the current. The main advantage of this circuit is that it can provide the most accurate measurement (different from a simple voltage separator).