JEE Advanced 2020 Concept Recapitulation Test 1 Paper 1

Question : 18 of 54

Marks: +1, -0

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?