An $\mathrm{\alpha }-$ particle travels in a circular path of radius 0.45 m in a magnetic field  with a speed of  . The period of revolution of the $\mathrm{\alpha }-$ particle is

(a)   sec          (b)  $1.1×{10}^{-6}$ sec

(c)  $1.1×{10}^{-7}$ sec           (d)  $1.1×{10}^{-8}$ sec

Explanation is a part of a Paid Course. To view Explanation Please buy the course.

Difficulty Level: