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JEE Advanced 2020 Concept Recapitulation Test 1 Paper 1

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Question : 18

Total: 54

Four wires of equal length 8m are arranged as shown in the figure. Wires, 2,3 and 4 are of equal cross sectional area and wire 1 is of half the cross section of these wires. By how much distance pointer at point 5 must be moved to get null point?

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