A) straight line
B) circle
C) helix
D) cycloid
Correct Answer: A
Solution :
Due to electric field \[\varepsilon ,\] the force on a particle of charge q is \[F=q\varepsilon \] in the direction of the electric field-since E parallel to B, the velocity V of the particle is parrallel to B. Hence, B will not affect the motion of the particle since\[V\times B=0.\]You need to login to perform this action.
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