| ASSERTION: When force is zero, the charged particle follows linear path. |
| REASON: A charged particle enters in a uniform magnetic field, whose velocity makes an angle 6 with magnetic field will cover a linear path. |
A) If both assertion and reason are true and reason is the correct explanation of assertion.
B) If both assertion and reason are true and reason is not the correct explanation of assertion.
C) If assertion is true but reason is false.
D) If both assertion and reason are false.
E) If assertion is false but reason is true.
Correct Answer: C
Solution :
When charged particle enters the uniform field they makes angle \[\theta \]with the field. Then its path is decided by combined effect of two Component of velocity \[v\,\cos \theta \]parallel to the field. Due to the parallel field the charge will follow a linear and due to the perpendicular Component \[\left( v\,\sin \,\theta \right)\]of the field will be circular. This results in a helical path whose axis is parallel to the parallel component of the field.
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