A) Tangent galvanometer is a moving magnet type galvanometer
B) Tangent galvanometer works on tangent law

Options

A. A is true, B is false
B. A is false, B is true
C. A & B are true
D. A & B are false

Answer

To solve the question regarding the tangent galvanometer and its principles, we will analyze each statement provided and determine their validity step by step.

### Step 1: Analyze Statement A
- **Statement A**: "Tangent galvanometer is a moving magnet type galvanometer."
- **Explanation**: A tangent galvanometer is indeed a type of galvanometer that uses a moving magnet to measure current. It consists of a circular coil through which current flows, and a magnetic needle that moves in response to the magnetic field created by the current. Therefore, this statement is **true**.

### Step 2: Analyze Statement B
- **Statement B**: "Tangent galvanometer works on tangent law."
- **Explanation**: The tangent galvanometer operates based on the tangent law, which states that when a magnetic needle is placed in a magnetic field, it will align itself at an angle such that the tangent of that angle is proportional to the ratio of the magnetic field due to the current in the coil to the horizontal component of the Earth's magnetic field. This means that this statement is also **true**.

### Step 3: Conclusion
- Since both statements A and B are true, the correct option is that both A and B are true.

### Final Answer
The correct option is: **A and B are true.**

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