(a) Draw a labellel diagram of a moving coil galvanometer. Describe briefly its principle and working.
(b) Answer the following:
(i) Why is it necessary to introduce a cyclindrical soft iron core inside the coil of a galvanometer?
(ii) Increasing the current sensitivity of galvanometer may not necessarily increase its voltage sensitivity. Explain, giving reason.

Explanation

### Solution

#### Part (a): Moving Coil Galvanometer

1. **Diagram**:
- Draw a rectangular coil (ABCD) suspended between the poles of a magnet (North and South).
- Indicate the soft iron core inside the coil.
- Add a spring attached to the coil to provide restoring torque.
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