A helium nucleus enters perpendicularly in magnetic field 'B' with velocity 'v', then magnetic force acting on it will be

A helium nucleus enters perpendicularly in magnetic field 'B'�

1.	A helium nucleus enters perpendicularly in magnetic field 'B' with velocity 'v', then magnetic force acting on it will be
A.	2 Bev
B.	zero
C.	evB
D.	evB/2
Answer» B. zero

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A&nbsp;helium&nbsp;nucleus&nbsp;enters&nbsp;perpendicularly&nbsp;in&nbsp;magnetic&nbsp;field&nbsp;&#39;B&#39;&nbsp;with&nbsp;velocity&nbsp;&#39;v&#39;,&nbsp;then&nbsp;magnetic&nbsp;force&nbsp;acting&nbsp;on&nbsp;it&nbsp;will&nbsp;be

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A helium nucleus enters perpendicularly in magnetic field 'B' with velocity 'v', then magnetic force acting on it will be