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Moving Charges And Magnetism

Question
CBSEENPH12039703
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A charged particle of mass m and charge q travels on a circular path of radius r that is perpendicular to a magnetic field B. The time taken by the particle to complete one revolution is

  • fraction numerator 2 πmq over denominator straight B end fraction
  • fraction numerator 2 πq squared straight B over denominator straight m end fraction
  • fraction numerator 2 πqB over denominator straight m end fraction
  • fraction numerator 2 πm over denominator qB end fraction

Solution

D.

fraction numerator 2 πm over denominator qB end fraction mω squared straight r space equals Bqωr straight omega space equals space Bq divided by straight m straight T space equals fraction numerator 2 πm over denominator qB end fraction

Some More Questions From Moving Charges And Magnetism Chapter

Two moving coil meters, M1 and M2 have the following particulars:
R1 = 10 Ω   N1 = 30,
A1 = 3.6 x 10–3 m2,  B1 = 0.25 T
R2 = 14 Ω;  N2 = 42,
A2 = 1.8 x 10–3 m2, B2 = 0.50 T
(The spring constants k are identical for the two meters).
Determine the ratio of (a) current sensitivity and (b) voltage sensitivity of M2 and M1.

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