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8) A proton, moving north, enters a magnetic field. Because of this field, the proton curves...

8) A proton, moving north, enters a magnetic field. Because of this field, the proton curves downward. We may conclude that the magnetic field must have a component

A) downward.

B) upward.

C) towards the east.

D) towards the west.

E) towards the north.

I know the answer is C), but I'm not sure how. Can someone comment on how to solve this using F = q( V x B)

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