An electron is launched with velocity in a uniform magnetic field .The angle $\theta$between and is between 0 and 90^o.As a result, the electron follows a helix, its velocity vector returning to its initial value in a time interval of: A)2πm/eB B)2πmv/eB C)2πmv sin$\theta$/eB D)2πmv cos$\theta$/eB E)none of these

Question

Quizplus · Accepted Answer

The time interval for the velocity vector to return to its initial value is the period of the circular motion component of the helical path, which is given by $ T = \frac{2\pi m}{eB} $.

An Electron Is Launched with Velocity in a Uniform Magnetic θ\thetaθ

An Electron Is Launched with Velocity in a Uniform Magnetic $\theta$