An Electron Moving with a Velocity = 5

question 34

Multiple Choice

An electron moving with a velocity = 5.0 × 107 m/s î enters a region of space where perpendicular electric and a magnetic fields are present. The electric field is
= ĵ) What magnetic field will allow the electron to go through the region without being deflected?

• A) = +2.0 × 10^-4 T ĵ
• B) = -2.0 × 10^-4 T ĵ
• C) = +2.0 × 10^-4 T
• D) = -2.0 × 10^-4 T
• E) = +5.0 × 10^-4 T

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