A Beam of Charged Particles Moving with a Speed of 10⁶

Multiple Choice

A beam of charged particles moving with a speed of 10⁶ m/s enters a uniform magnetic field of 0.1 T at right angles to the direction of motion.If the particles move in a radius of 0.2 m,then calculate their period of motion.

A) 6.3 $\times$ 10^-7 s
B) 1.3 $\times$ 10^-7 s
C) 1.3 $\times$ 10^-6 s
D) 4.1 $\times$ 10^-7 s
E) none of the above