Question

A charge particle is projected at velocity V parallel to a current carrying wire as shown in figure.Charge and wire are in same plane. Possible path of charge would be

• A. circular
• B. helical
• C. undeflected
• D. none of these

Answer 1

The correct option is D none of these

$R=\frac{mv}{qB}$ & $B=\frac{{\mu }_{o}i}{2\pi R}$

So as particle reaches close to wire R decreases as B increases.