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

(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

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