an alpha particle is moving along a circle of radius 0.45m in a magnetic field of 12T.Find (i)the speed of the paticle ,(ii)the time period of the particle.(mass of alpha particle is 6.7*10^-27kg). ans is (i)2.58*10^8m per secs,(ii)1.09*10^-8s Share with your friends Share 16 Vara answered this (i)Speed of the particle:v=Bqrm =123.2×10-190.456.7×10-27 =2.58×108 m/s(ii)Time period of the particle:T=2πrv =2π0.452.58×108 =1.09×10-8 s 11 View Full Answer