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An electron travelling with a spped u al...

An electron travelling with a spped `u` along the positive `x`-axis enters into a region of magnetic field where `B= - B_(0)hat (K) (xgt0)`. It comes out of the region with speed `v` then

A

`v=u at ygt0`

B

`v=u at ylt0`

C

`vgtu at ygt0`

D

`vgtu at ylt0`

Text Solution

Verified by Experts

The correct Answer is:
b
The force acting on the electron will be perpendicular to the
direction of velocity till the electron remains in the magnetic
field. So, the electron will follow the path as given.
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