Tangent galvanometer measure

Options

A. caраcitance
B. current
C. resistance
D. potential difference

Answer

To solve the question regarding what a tangent galvanometer measures, we can follow these steps:

### Step 1: Understand the Function of a Tangent Galvanometer
A tangent galvanometer is an instrument used to measure electric current. It operates based on the interaction between the magnetic field produced by the current and the Earth's magnetic field.

**Hint:** Recall the basic principle of a tangent galvanometer and its purpose in measuring current.

### Step 2: Identify the Working Principle
The working principle of the tangent galvanometer is based on the tangent law. According to this law, the magnetic field (B) created by the current-carrying coil is proportional to the tangent of the angle (θ) that the compass needle makes with the magnetic meridian.

**Hint:** Consider how the magnetic field generated by the galvanometer interacts with the Earth's magnetic field.

### Step 3: Analyze the Options
The options given are:
- Capacitance
- Current
- Resistance
- Potential Difference

Since we have established that the tangent galvanometer measures electric current, we can eliminate the other options.

**Hint:** Think about the definitions of capacitance, resistance, and potential difference to see why they do not apply.

### Step 4: Conclusion
Based on the understanding of the tangent galvanometer and its working principle, we conclude that the correct answer is that it measures **current**.

**Hint:** Remember that the primary function of a measuring device is crucial in determining the correct answer.

### Final Answer
The tangent galvanometer measures **current**.