Electrons in electric field · PhysicsBowl 2013 #29

Physics · electromagnetism

Problem

Two electrons enter a region between charged capacitor plates with equal speed

v_0

. Electron A is directed horizontally to the left while electron B is directed at

30°

below the horizontal. Each electron makes it to the left-hand plate. Which one of the following choices best compares the speeds of the charges (

v_A

v_B

) upon arrival at the left plate? Consider only the electrons A and B's interactions with the constant electric field between the plates, ignoring any relativistic effects. (A)

v_A < v_B

(B)

v_A = v_B

(C)

v_A > v_B

(D) The answer depends on the size of the plate separation,

d

. (E) The answer depends on the magnitude of the charge,

Q

, on each plate.

Browse the problem library