Question

# Path of charged particle, if only magnetic force acts on it can be.

A
circle
B
helix with constant pitch
C
helix with variable pitch
D
cycloid
Solution
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#### If the velocity of the charged makes an angle θ with the direction of the magnetic field, ,due to component perpendicular to →B , the particle moves in a circle. The component parallel to →B provides motion along the →B.Thus, the particle will have a helical path. In a uniform magnetic field, the pitch will be constant.

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