A horizontally projected beam of electrons travels at 55 km/s into the space between two horizontal, parallel plates. The beam travels exactly horizontally the whole time it is between the plates. What does this imply about the electric field between the plates?
A) It is 0.
B) It is 56 pV/m upward.
C) It is 56 pV/m downward.
D) It doesn't imply anything in particular.

Question

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The Answer of A horizontally projected beam of electrons travels at 55 km/s into the space between two horizontal, parallel plates. The beam travels exactly horizontally the whole time it is between the plates. What does this imply about the electric field between the plates?
A) It is 0.
B) It is 56 pV/m upward.
C) It is 56 pV/m downward.
D) It doesn't imply anything in particular.

A Horizontally Projected Beam of Electrons Travels at 55 Km/s