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and gives and S, = 1 W, S, = 0.1 W Sz = ...

and gives and S, = 1 W, S, = 0.1 W Sz = 0.01 W Q. 29 Five long w Five long wires A, B, C, D and E, each carrying current I are arranged to form edges of a pentagonal prism as shown in figure. Each carries current out of the plane of paper. (a) What will be magnetic induction at a point on the axis O? Axis is at a distance R from each wire. (b) What will be the field if current in one of the wires (say A) is switched off? (C) What if current in one of the wire (say A) is reversed? OB DO Thinking Process The vector sum of magnetic field produced by each wire at O is equal to 0.

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