Question

A tightly wound long solenoid has ‘n’ turns per unit length, a radius ‘r’ and carries a current I. A particle having charge ‘q’ and mass ‘m’ is projected from a point on the axis in a direction perpendicular to the axis. The maximum speed of the particle for which the particle does not strike the solenoid is

• A. $\frac{\mu_onlqr}{m}$
• B. $\frac{\mu_onlqr}{2m}$
• C. $\frac{\mu_onlqr}{4m}$
• D. $\frac{\mu_onlqr}{8m}$

Answer 1

Answer: (B)

$\frac{\mu_onlqr}{2m}$

Answer 2

The correct answer is (B) : $\frac{\mu_onlqr}{2m}$.