Tangent galvanometer is used to measure

Options

A. Potential difference
B. Current
C. Resistance
D. In measuring charge

Answer

To solve the question regarding the function of a tangent galvanometer, we can break it down into several steps:

### Step-by-Step Solution:

1. **Understanding the Tangent Galvanometer**:
A tangent galvanometer is an instrument that is used to measure electric current. It consists of a circular coil of wire and a compass needle.

2. **Principle of Operation**:
The working principle of the tangent galvanometer is based on the tangent law. When an electric current passes through the coil, it generates a magnetic field. This magnetic field interacts with the Earth's magnetic field.

3. **Deflection of the Compass Needle**:
The compass needle, which is placed at the center of the coil, will deflect due to the magnetic field created by the current in the coil. The angle of deflection is proportional to the strength of the magnetic field produced by the current.

4. **Measurement of Current**:
By measuring the angle of deflection of the compass needle, we can determine the current flowing through the coil. The relationship between the deflection angle and the current is given by the tangent law, which states that the tangent of the angle of deflection is proportional to the current.

5. **Conclusion**:
Therefore, the tangent galvanometer is specifically used to measure electric current.

### Final Answer:
The tangent galvanometer is used to measure electric current.

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