An Electron Enters the Region Between Two Plates Traveling Along

question 33

Multiple Choice

An electron enters the region between two plates traveling along the x-direction with a speed of v = 4.78 * 10⁶ m/s.Both plates are parallel to the x-y plane and are separated by 4.5 cm.The potential of the top plate at z = 4.5 cm is +100 V while the potential of the bottom plate at z = 0 cm is 0 V.What is the direction of the magnetic field between the plates that is required so that the electron continues traveling in a straight line along the x-direction in this region?

• A)positive y-direction
• B)negative y-direction
• C)positive z-direction
• D)negative z-direction
• E)positive x-direction

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