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Lorentz force acting on a charged partic...

Lorentz force acting on a charged particle is zero. If electric field is `5V/m`, then `|(vecBxxvecV)|=` ______ .

A

zero

B

infinite

C

5

D

none of these

Text Solution

Verified by Experts

The correct Answer is:
C
Lorentz force `vecF=q[vecE+(vecvxxvecB)]`
`0=q[vecE+(vecvxxvecB)]`
`therefore0=[vecE+(vecvxxvecB)]`
`therefore-(vecvxxvecB)=vecE`
`therefore(vecBxxvecv)=vecE" "[becausevecvxxvecB=-(vecBxxvecv)]`
`therefore(vecBxxvecv)=5`
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