A circular coil of average radius 6 cm has 20 turns. A current 1.0 A is set up through it. Find the magnetic induction at
(i) The centre of the coil

Explanation

To find the magnetic induction (magnetic field) at the center of a circular coil, we can use the formula for the magnetic field at the center of a circular coil:

### Step-by-Step Solution

1. **Identify the Given Values:**
- Radius of the coil, \( r = 6 \, \text{cm} = 0.06 \, \text{m} \) (convert cm to m)
- Number of turns, \( n = 20 \)
- Current, \( I = 1.0 \, \text{A} \)
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