1.

An electron moves in a circular orbit with a uniform speed v. It produces a magnetic field B at the centre of the circle. The radius of the circle is proportional to

Answer»

`B/v`
`v/R`
`sqrt(v/B)`
`sqrt(B/v)`

Solution :Equivalent CURRENT DUE to motion of electron in a circular orbit of radius R is `I = (EV)/(2 pi R)` and magnetic FIELD B at the centre of the circular orbit `B = (mu_0 I)/(2R) = (mu_0)/(2R) cdot (ev)/(2 pi R) = (mu_0 ev)/(4pi R^2)`
`:. R = sqrt((mu_0 ev)/(4 pi B)) "or" R prop sqrt((v)/(B))`


Discussion

No Comment Found

Related InterviewSolutions