Question

The figure shows a long straight conductor carrying a current I. A magnetic field is produced around the conductor.

What is the magnitude of the magnetic induction at a point ‘P’ which is at a distant ‘x’ from the conductor? What is the shape of the magnetic line of force?

Answer 1

1.  B = \(\frac{\mu_0I}{2\pi x}\). Magnetic field is directed in to the plane of paper.

2. Circular.