Pseudo vector is

Options

A. linear momentum
B. Angular momentum
C. Force
D. All the above

Answer

To determine which of the given options is a pseudo vector, we need to analyze each option based on the definition of pseudo vectors.

### Step-by-Step Solution:

1. **Understanding Pseudo Vectors**:
- Pseudo vectors are vectors that remain unchanged under certain transformations, specifically:
- They do not change when the coordinate system is rotated.
- They do not change when a mirror image is taken.

2. **Analyzing Linear Momentum**:
- Linear momentum (denoted as **p**) is defined as the product of mass and velocity: **p = m * v**.
- If we rotate the reference frame, the components of the velocity vector **v** will change. Thus, linear momentum will also change.
- **Conclusion**: Linear momentum is **not** a pseudo vector.

3. **Analyzing Angular Momentum**:
- Angular momentum (denoted as **L**) is given by the formula: **L = r × p** (where **r** is the position vector and **p** is the linear momentum).
- The direction of the angular momentum vector is determined by the right-hand rule and is perpendicular to the plane formed by **r** and **v**.
- When the reference frame is rotated, the angular momentum vector remains unchanged in direction and magnitude.
- Additionally, if we take a mirror image of the angular momentum vector, it still points in the same direction (inside the screen).
- **Conclusion**: Angular momentum is a pseudo vector.

4. **Analyzing Force**:
- Force (denoted as **F**) is defined by Newton's second law: **F = m * a** (where **a** is acceleration).
- Similar to linear momentum, if the reference frame is rotated, the components of the force vector will change.
- Therefore, force does not satisfy the conditions of a pseudo vector.
- **Conclusion**: Force is **not** a pseudo vector.

5. **Final Evaluation**:
- The only option that qualifies as a pseudo vector is angular momentum.
- Therefore, the correct answer is **angular momentum**.

### Final Answer:
**Angular Momentum** is a pseudo vector.