Two equal-but-opposite charges, with the same mass, are travelling through a reg

Question

Two equal-but-opposite charges, with the same mass, are travelling through a region of uniform magnetic field. They both have the same initial velocity perpendicular to the direction of the magnetic field.

How will the subsequent motion of these particles be different?

a. The particles will be split apart by oppositely directed magnetic forces, and after a long time passes they'll be moving parallel to the magnetic field (in opposite directions).

b. The particles will travel in circular paths, one of which will have a smaller radius.

c. The particles will travel in circular paths, one of which will be clockwise and the other counter-clockwise.

d. The particles will travel along identical trajectories at all times.

Explanation / Answer

c. The particles will travel in circular paths, one of which will be clockwise and the other counter-clockwise.

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