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Question
What is the role of the battery arm in a Wheatstone bridge circuit?
Options
To detect null deflection
To supply voltage to the bridge
To limit the current in the circuit
To measure the unknown resistance
MCQ
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Solution
The battery arm (AC in standard notation) is the diagonal across which the battery is connected to supply voltage to the bridge. This arm provides the electrical energy needed for the bridge to operate and allows current to distribute through the four resistance arms.
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