Moving Charges and Magnetism · Class 12 · CBSE · Science Physics
An electron (mass 9.1 x 10^-31 kg, charge 1.6 x 10^-19 C) moves at 3 x 10^7 m/s perpendicular to a magnetic field of 0.1 T. The radius of its circula…
Practice question from Moving Charges and Magnetism (Class 12 · CBSE · Science Physics), with the correct answer and a step-by-step solution.
medium · MCQ · Q-BEFBB8
An electron (mass 9.1 x 10^-31 kg, charge 1.6 x 10^-19 C) moves at 3 x 10^7 m/s perpendicular to a magnetic field of 0.1 T. The radius of its circular path is approximately:
- A.1.7 x 10^-3 mCorrect answer
- B.1.7 x 10^-6 m
- C.3.4 x 10^-3 m
- D.1.7 x 10^3 m
Solution
Use r = mv / (qB).
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