The area of the coil in a moving coil galvanometer is `16 cm^2` and has 20 turns. The magnetic induction is 0.2T and the couple per unit twist of the suspended wire is `10^(-6) `Nm per degree. If the deflection is `45^@` calculate the current passing through it

Explanation

To solve the problem, we will use the formula that relates the couple per unit twist, the deflection angle, the number of turns, the area of the coil, and the magnetic induction to find the current passing through the galvanometer.

### Step-by-Step Solution:

1. **Convert the Area from cm² to m²**:
The area of the coil is given as \(16 \, \text{cm}^2\). To convert this to square meters:
\[
A = 16 \, \text{cm}^2 = 16 \times 10^{-4} \, \text{m}^2 = 0.0016 \, \text{m}^2
...