Two circular coils of wire each having a radius of `4cm` and `10 turns` have a common axis and are `3cm` apart If a current of `1A` passes through each coil in the opposite direction find the magnetic induction
(i) At the center of either coil
(ii) At a point on the axis, midway between them .

Explanation

To solve the problem, we will calculate the magnetic induction at two different points: (i) at the center of either coil and (ii) at a point on the axis, midway between the two coils.

### Given Data:
- Radius of each coil, \( R = 4 \, \text{cm} = 0.04 \, \text{m} \)
- Number of turns in each coil, \( N = 10 \)
- Distance between the coils, \( d = 3 \, \text{cm} = 0.03 \, \text{m} \)
- Current through each coil, \( I = 1 \, \text{A} \)

...