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प्रश्न
A particle with charge q moves with a velocity v in a direction perpendicular to the directions of uniform electric and magnetic fields, E and B respectively, which are mutually perpendicular to each other. Which one of the following gives the condition for which the particle moves undeflected in its original trajectory?
पर्याय
`"v" = "E"/"B"`
`"v" = "B"/"E"`
`"v" = sqrt("E"/"B")`
`"v" ="q" "B"/"E"`
MCQ
रिकाम्या जागा भरा
उत्तर
`"v" = "E"/"B"`
Explanation:
When particle moves undeflected, magnetic force and electric force on particle exactly balance each other, i.e., `"F"_"m" = "F"_"e"`
qvB = qE `=> "v" ="E"/"B"`
shaalaa.com
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