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In Wheatstone’s bridge, all the four arms have equal resistance R. If resistance of the galvanometer arm is also R, then equivalent resistance of the combination is
The Wheatstone bridge is balanced since all four arms have equal resistance R. The galvanometer arm also has resistance R. The equivalent resistance of the entire network simplifies to R, using series-parallel reduction. Hence, the correct answer is (a) R.
Class 12th Science Physics NCERT MCQ Questions
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