Question

# A charged particle is released from the 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
Solution
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#### The correct option is A Straight lineAs initially the particle is at rest,The magnetic field won't act and Electric field gives the particle motionin direction parallel to →ENow when the particle gains motion,but v ||E and E || B,Ultimately v || B,Hence there will be no magnetic force acting on tje particle to deviate its path,Hence the Particles motion wil be always straight.Option A is the correct answer.

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