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Sahay Sir > Question Answers > Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) > Two parallel wires P and Q placed at a seperation d = 6 cm on the x axis carry electric current i1 = 5 A and i2 = 2 A in opposite directions as shown in figure. Find the point on the line PQ where the resultant magnetic field is zero.

Two parallel wires P and Q placed at a seperation d = 6 cm on the x axis carry electric current i1 = 5 A and i2 = 2 A in opposite directions as shown in figure. Find the point on the line PQ where the resultant magnetic field is zero.

A cylindrical wire of radius R is carrying current uniformly distributed current i over its cross section . If a circular loop of radius r is taken as amperian loop then the variation value of phi B.dl over this loop with radius r of loop will be best represented by