Question

pls give me explanation (answer is 1)

Two long parallel wires are at a distance 2d 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 :-

Answer 1

Answer:

1/4π€• q/4d^2.....

Explanation:

if u telling acc to the question then in the magnetic field the charge is bqv