Moving Charges and Magnetism - Result Question 24

24. 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: 24. (d)

Solution:

  1. (d) When the deflection produced by electric field is equal to the deflection produced by magnetic field, then the electron can go undeflected.