A tightly-wound, long solenoid has n turns per unit length, a radius r and carries a current i. A
Channel: Doubtnut
Date: 2020-07-05

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. What can be the maximum speed  for which the particle does not strike the solenoid?