Two parallel beams of positrons moving in the same direction will________?
Correct answer: A. repel each other
- A. repel each other
- B. not interact with each other
- C. attract each other
- D. be deflected normal to the plane containing the two beams.Educational Resources
Explanation
Two parallel beams of positrons produce electric repulsion because both beams carry positive charge. Their moving charges also produce magnetic attraction, but for speeds below the speed of light the electric repulsion is greater, so the net interaction is repulsive. The likely choice is c, because students may consider only the magnetic attraction between parallel moving charges.
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About Magnetic Flux Density
Magnetic flux density measures the magnetic force acting on a current carrying conductor or moving charge in a magnetic field. Work includes the relations B equals F divided by IL and F equals qvB, the tesla as its SI unit, field direction and the distinction between flux density and magnetic flux.
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