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+1 vote
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in Physics by (98.2k points)
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An electron moving with a speed u along the positive x-axis at `y=0` enters a region of uniform magnetic field which exists to the right of y-axis. The electron exits from the region after some time with the speed v at coordinate y, then
image
A. `v gt u, y lt 0`
B. `v = u, y gt 0`
C. `v gt u, y gt 0`
D. `v = u, y lt 0`

1 Answer

+1 vote
by (97.8k points)
selected by
 
Best answer
Correct Answer - `D`
Since magnetic fore is `bot`
`oversetrarrF =- e (oversetrarrV xx oversetrarrB)`
` = - eVB_(0) (hati xx -hatk) =eVB_(0) (-hatj)`
image .

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