If R1= 1Q, R2-20 and Ru-3Q, (a) to what value the Rvar should be adjusted so as to achieve balance condition? (b)lf VO 6 V, Ra 0.1 Q(resistance in the meter), and Ru were then to deviate by a small amount to Ru 3.01 Q, what would be the reading on the ammeter? C R2 R1 3. Ru Rvar d.

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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).