In a cyclotron, a magnetic field of `2*4T` is used to accelerate protons. How rapidly should the electric field between the dees be reversed? The mass and the charge of protons are `1*67xx10^(-27)kg` and `1*6xx10^(-19)C` respectively.

Options

A. `1.342xx10^(-69)`
B. `2.342 xx10^(-8)`
C. `2.3645xx10^(-10)`
D. none of these

Explanation

Given magnetic field B= 1.4 `wbm^(-2)`
charge of protons q=`1.6xx10^(-19) C`
mass of proton m `=1.67xx10^(-27)`kg
`T=(pim)/(Bq)=(3.142 xx1.67xx10^(-27))/(1.4xx1.6xxx10^(-19))`
`T= 2.342xx10^(-8)` S