An electron of mass m and charge e moves in a circular path in a magnetic field of flux density B. How long does it take to complete one orbit?

By: |Published on: Mar 24|Categories: Physics WAEC| 0 comments

A. 2me/Bπ
B. 2B/meπ
C. 2Ï€m/Be
D. Be/2Ï€m

Correct Answer:

Option C = 2Ï€m/Be

Explanation

Motion of charged particles in Magnetic field

qvb = MV2/r
where q = e

Introducing Period (T) as time taken to complete one orbit = 2Ï€/Mqe

 

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