An electron of mass "m" and charge "e" is moving in a circle of radius "r" with speed "v" in a uniform magnetic field strength "B".Then:
Correct answer: A. rœm
- A. rœm
- B. rœB
- C. rœI/v
- D. rœI/m
Explanation
The magnetic force provides the necessary centripetal force "F," to the electrons, each having mass "m". So, the electrons move in circular path of radius "r".
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About Electromagnetism
Magnetic flux density and magnetic flux describe the strength of a magnetic field and the field passing through a surface. A charged particle moving through a magnetic field experiences a force perpendicular to its velocity and may follow circular or helical motion, depending on the angle between velocity and field.
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