A solid wire of radius 10 cm carries a current of 5.0 A distributed uniformly over its cross section. Find the magnetic field B at a point at a distance (a) 2 cm (b) 10 cm and (c) 20 cm away from the axis.

Explanation

To solve the problem of finding the magnetic field \( B \) at various distances from the axis of a solid wire carrying a current, we will use Ampere's Circuital Law. The wire has a radius of 10 cm and carries a current of 5 A uniformly distributed across its cross-section.

### Given:
- Radius of the wire, \( R = 10 \, \text{cm} = 0.1 \, \text{m} \)
- Total current, \( I = 5 \, \text{A} \)

### (a) Magnetic Field at a distance of 2 cm from the axis

...