Two parallel beams of positrons moving in the same direction will

Options

A. attract each other
B. Repel each other
C. not interact with each other
D. be deflected normal to the plane containing the two beams

Explanation

To solve the question regarding the interaction between two parallel beams of positrons moving in the same direction, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Positrons**:
- A positron is the antiparticle of an electron, which means it has the same mass as an electron but carries a positive charge (+e).

2. **Direction of Current**:
- Since positrons are positively charged, the direction of current associated with the flow of positrons is in the same direction as the movement of the positrons.

3. **Current-Carrying Conductors**:
- When two parallel conductors carry current in the same direction, they exert a magnetic force on each other. Specifically, they attract each other.

4. **Magnetic Field Generation**:
- Each current-carrying conductor generates a magnetic field around it. The direction of the magnetic field can be determined using the right-hand rule.

5. **Force Between the Beams**:
- For two parallel beams of positrons moving in the same direction, we can draw an analogy to two parallel wires carrying current in the same direction.
- According to Ampère's force law, when two currents are in the same direction, they attract each other.

6. **Conclusion**:
- Therefore, two parallel beams of positrons moving in the same direction will attract each other.

### Final Answer:
Two parallel beams of positrons moving in the same direction will attract each other.

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