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An electron is travelling along the x...

An electron is travelling along the x-direction. It encounters a magnetic field in the y-direction. Its subsequent motion wil be

A

Straight line along the `x`-direction

B

A circle in the `xz`-plane

C

A circle in the `yz`-plane

D

A circle in the `xy`-plane

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The correct Answer is:
B
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