CameraIcon
CameraIcon
SearchIcon
MyQuestionIcon


Question

The monoenergetic beam of electrons moving along + y direction enters a region of uniform electric and magnetic fields. If the beam goes straight undeflected, then fields B and E are directed respectively along
  1. + x axis and + z axis
  2. - x axis and - y axis
  3. + z axis and + x axis
  4. -y axis and - z axis


Solution

The correct option is A + x axis and + z axis
The total Lorentz force on the electron is
F = - e (E + v × B)
For the electron to be undeflected, E=v×B
When the options are checked, only option (C) satisfies this condition.

flag
 Suggest corrections
thumbs-up
 
0 Upvotes


Similar questions
View More


People also searched for
View More



footer-image