L Four long current carrying wires each having current are placed along z axis at point P Q R and Co ordinates of these points

Question

L Four long current carrying wires each having current are placed along z axis at point P Q R and Co ordinates of these points are shown in figure If line integral B d along the line x a from pc A a a to B a a is Nul then value of N is a a 22 SO OP aa 22

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