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JEE Main2010PhysicsMagnetic Effects of CurrentActual

Two long parallel wires are at a distance 2 ~d apart. They carry steady equal current flowing out of the plane of the paper as shown. The variation of the magnetic field along the line XX ' is given by

Correct answer

0

Step-by-step solution

The magnetic field in between because of each will be in opposite direction aligned B_ in between & = ₀ i 2 x j - ₀ i 2 (2 d-x) (- j ) & = ₀ i 2 [ 1 x - 1 2 d-x ]( j ) aligned at x=d, B_ in between =0 for x d, B_ in between =(- j ) towards x net magnetic field will add up and direction will be (- j ) towards x ^ net magnetic field will add up and direction will be ( j )

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