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The Circular Motion

A charged par...

Question

A charged particle enters in a magnetic field $H$ with its initial velocity making an angle of $45^{o}$ with $H$ . The path of the particle will be

A

an ellipse

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B

straight line

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C

a circle

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D

a helical

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Solution

The correct option is D a helical
The component of velocity perpendicular to $H$ will make the motion circular while that parallel to $H$ will make it move along a straight line. The two together will make the motion helical.

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