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NEET 2001 (AIPMT) · Wheatstone Bridge & Metre Bridge

Wheatstone Bridge & Metre Bridge question from NEET 2001 (AIPMT)

Q86NEET 2001 · AIPMTEasy

Wheatstone Bridge & Metre Bridge

The resistance of each arm of the Wheatstone's bridge is 10 ohm. A resistance of 10 ohm is connected in series with a galvanometer then the equivalent resistance across the battery will be

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Answer: (a)

All arms are $10\ \Omega$ , so the bridge is balanced; the galvanometer branch (with its series $10\ \Omega$ ) carries no current.
Remaining: two $20\ \Omega$ branches in parallel.
$R_{eq} = 10\ \Omega$
So the answer is (a) 10 ohm.

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