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NEET 2003 Physics question

PhysicsCurrent ElectricityNEET 2003

In a Wheatstone's bridge all the four arms have equal resistance . If the resistance of the galvanometer arm is also , the equivalent resistance of the combination as seen by the battery is :

Answer: (3)

Solution

All four arms are equal, so the bridge is balanced () and no current flows through the galvanometer arm; its resistance is irrelevant. The battery then sees two parallel branches, each made of two

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Question ID VK-089165