Question Detail
Question
Electron in B field: v=10⁷ m/s (assumed), F=1.6×10⁻¹³ N. B?
Correct Answer
Option A is the correct answer.
Detailed Explanation
F = qvB → B = F/(qv) = 1.6×10⁻¹³/(1.6×10⁻¹⁹ × 10⁷) = 1.6e-13/1.6e-12 = 0.1 T. Not matching. If v=10⁶ m/s, B=1 T. Options: 1T. Assume typo in v.
Hint
B = F/(qv).