A galvanometer is said to be sensitive, if it gives

Options

A. large deflection for a small current
B. large deflection for a large current
C. small deflection for a small current
D. small deflection for a large current

Answer

To determine the sensitivity of a galvanometer, we need to understand what is meant by sensitivity in this context. A galvanometer is considered sensitive if it can produce a large deflection in its needle for a small amount of current passing through it.

### Step-by-Step Solution:

1. **Understanding Sensitivity**:
- Sensitivity of a galvanometer refers to its ability to detect small currents. A more sensitive galvanometer will show a significant needle deflection even when a small current is applied.

2. **Deflection for Small Current**:
- If a galvanometer shows a large deflection for a small current, it indicates that the instrument can effectively respond to minor changes in current. This is a key characteristic of sensitivity.

3. **Comparing Deflections**:
- Consider two hypothetical galvanometers:
- Galvanometer A shows a small deflection for a large current.
- Galvanometer B shows a large deflection for a small current.
- In this case, Galvanometer B is more sensitive because it reacts more significantly to smaller inputs.

4. **Conclusion**:
- Therefore, a galvanometer is said to be sensitive if it gives a **large deflection for a small current**. This means that the correct answer to the question is that a galvanometer is sensitive when it provides a large deflection for a small current.

### Final Answer:
A galvanometer is said to be sensitive if it gives a **large deflection for a small current**.

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