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A particle with a specific charge s is f...

A particle with a specific charge s is fired with a speed v toward a wall at a distance d, perpendicular to the wall. What minimum magnetic field must exist in this region for the particle not to hit the wall?

A

`v//sd`

B

`2v//sd`

C

`v//2sd`

D

`v//4sd`

Text Solution

Verified by Experts

The correct Answer is:
a
The particle moves in a cicular path with radius d if it is to just miss the wall.
`implies mv=Bqr, r=d`
or `B=v/((q//m)d)=v/(sd)`
.
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