To convert a galvanometer into a voltmeter, one should connect a

Options

A. High resistance in series with galvanometer
B. Low resistance in series with galvanometer
C. High resistance in parallel with galvanometer
D. Low resistance in parallel with galvanometer

Answer

To convert a galvanometer into a voltmeter, we need to follow these steps:

1. **Understanding the Function of a Galvanometer**: A galvanometer is an instrument used to detect and measure small electric currents. It has a limited range and is not suitable for measuring high voltages directly.

2. **Need for Conversion**: To measure higher voltages, we need to modify the galvanometer so that it can measure potential differences (voltages) instead of current.

3. **Connecting Resistance**: To convert a galvanometer into a voltmeter, we need to connect a resistance in such a way that it can handle the higher voltage without damaging the galvanometer.

4. **Choosing the Right Resistance**:
- If we connect a **low resistance** in series, it would allow too much current to flow through the galvanometer, potentially damaging it.
- If we connect a **high resistance** in series with the galvanometer, it will limit the current flowing through the galvanometer, allowing it to measure higher voltages safely.

5. **Final Conclusion**: Therefore, to convert a galvanometer into a voltmeter, we should connect a **high resistance in series with the galvanometer**.

Thus, the correct answer is: **High resistance in series with galvanometer**.