Choose the one alternative that best completes the statement or answers the question. -An electron, moving west, enters a magnetic field. Because of this field the electron curves upward. We may

Choose the one alternative that best completes the statement or answers the question.
-An electron, moving west, enters a magnetic field. Because of this field the electron curves upward. We may conclude that the magnetic field must have a component
A) towards the south.
B) upward.
C) downward.
D) towards the north.
E) towards the west.

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