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A charge q moves in a region where elect...

A charge q moves in a region where electric field as well as magnetic field exist, then force on it is

A

(II) (iii) (S)

B

(III) (iii) (P)

C

(IV) (i) (S)

D

(IV) (ii) (R)

Text Solution

Verified by Experts

The correct Answer is:
A
`barF("net")=barF(e)+barF_(B)=qbarE+qbarvxxbarB`
For particle to move in straight line with constant velocity,
`F_("net")=0`
`:.qbarE+qbarvxxbarB=0impliesbarE=-(barVxxbarB)=barBxxbarv`
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