Question

A charged particle is released from rest in a region of steady and uniform electric and magnetic fields which are parallel to each other. The particle will move in a

A

straight line

B

circle

C

helix

D

cycloid

Medium
Solution
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Correct option is A)



$$F_B= q(\vec{v} \times \vec{B}$$
given   is parallel to  
since 
the charged particle will accelerate and move in a straight line.

solution
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