A) circular
B) elliptical
C) linear
D) helical
Correct Answer: D
Solution :
Suppose, the velocity v of the particle entering the field B, instead of being perpendicular to B, makes an angle \[\theta \] with it. Then, v may be resolved into two components, \[{{v}_{||}}\,=v\cos \theta \] parallel to B and \[{{v}_{\bot }}=v\,\sin \theta \] perpendicular to B. The component \[{{v}_{||}}\] gives a linear path and the component \[{{v}_{\bot }}\] gives a circular path to the particle. The resultant of these two is a helical path whose axis is parallel to the magnetic field.You need to login to perform this action.
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