Two parallel beams of electrons moving in the same direction produce a mutual force

Options

A. Of attraction in plane of paper
B. Of repulsion in plane of paper
C. Upwards perpendicular to plane of paper
D. Downwards perpendicular to plane of paper

Answer

To solve the problem of the mutual force between two parallel beams of electrons moving in the same direction, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Charges**:
- Both beams consist of electrons, which are negatively charged particles.

2. **Direction of Motion**:
- The electrons in both beams are moving in the same direction.

3. **Understanding the Interaction**:
- According to the principles of electromagnetism, like charges repel each other. Since both beams consist of negatively charged electrons, they will exert a force on each other.

4. **Determine the Nature of the Force**:
- Since both beams are made up of electrons, the mutual force between them will be repulsive. This is because they are both negatively charged.

5. **Direction of the Force**:
- The repulsion will occur in the plane of the paper, meaning that the force will act outward from each beam, away from each other.

6. **Conclusion**:
- Therefore, the mutual force between the two parallel beams of electrons moving in the same direction is a repulsive force acting in the plane of the paper.

### Final Answer:
The mutual force between two parallel beams of electrons moving in the same direction is a repulsive force in the plane of the paper.

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