Moving Charges And Magnetism Ques 19
19. An electron enters a region where magnetic field (B) and electric field (E) are mutually perpendicular, then
[1994]
(a) it will always move in the direction of $B$
(b) it will always move in the direction of $E$
(c) it always possesses circular motion
(d) it can go undeflected also
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Answer:
Correct Answer: 19.(d)
Solution:
- (d) When the deflection produced by electric field is equal to the deflection produced by magnetic field, then the electron can go undeflected.
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