The Wheatstone bridge in the circuit shown in Fig. P4.73 is balanced when equals . If
Chapter 22, Problem 73(choose chapter or problem)
The Wheatstone bridge in the circuit shown in Fig. P4.73 is balanced when equals . If the galvanometer has a resistance of how much current will the galvanometer detect, when the bridge is unbalanced by setting to ? (Hint: Find the Thvenin equivalent with respect to the galvanometer terminals when . Note that once we have found this Thvenin equivalent, it is easy to find the amount of unbalanced current in the galvanometer branch for different galvanometer movements.)
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