(a) An electron moves along a circle of radius 1m in a perpendicular magnetic field of strength 0.50 T. What would be its speed? Is it reasonable?(b) If a proton moves along a circle of the same radius in the same magnetic field, what would be its speed?

Explanation

(a) R = 1 m, B = 0.5 T, R = mu/qB`
`rArr v = 0.0879 xx 10^(10) `
` = 8.79 xx 10^(10)`
` = 8.8 xx 10^(10)m/s `
No it is not reponsilile as it is more than the speed of light
`(b) r = mu/ qB`
`rArr v = (qBr)/(m)= 0.5 xx 10 ^(8)`
`= 5 xx 10^(7) m/s ` .