An Electron Moves with a Speed Of $3.0 \times 104 \mathrm {~m} / \mathrm { s }$

question 145

Multiple Choice

An electron moves with a speed of $3.0 \times 104 \mathrm {~m} / \mathrm { s }$ perpendicular to a uniform magnetic field of $0.40$ T. What is the magnitude of the magnetic force on the electron? $\left( e = 1.60 \times 10 ^ { - 19 } \mathrm { C } \right)$

• A) \(4.8 \times 10 ^ { - 14 } \mathrm {~N}\)
• B) \(0 \mathrm {~N}\)
• C) \(2.2 \times 10 - 24 \mathrm {~N}\)
• D) \(5 \times 10 - 20 \mathrm {~N}\)
• E) \(1.9 \times 10 - 15 \mathrm {~N}\)

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