Moving Charges and Magnetism - Result Question 11
11. A beam of electron passes undeflected through mutuallyperpendicular electric and magnetic fields. If the electric field is switched off, and the same magnetic field is maintained, the electrons move
(a) in a circular orbit
(b) along a parabolic path
[2007]
(c) along a straight line
(d) in an elliptical orbit.
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Answer:
Correct Answer: 11. (a)
Solution:
- (a) If the electric field is switched off, and the same magnetic field is maintained, the electrons move in a circular orbit and electron will travel a magnetic field perpendicular to its velocity.
