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Two infinite sheets carrying current in ...

Two infinite sheets carrying current in same direction (of equal current per unit length K) are separated by a distance d. A proton is released from a point between the plates with a velocity parallel to the sheets but perpendicular to the direction of current in the sheets. Then the path of the proton is

A

circle

B

helix

C

straight line

D

straight line only if it is released from a point exactly midway between the two plates.

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The correct Answer is:
C
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