Question

A diople consisting of an electron and a proton separated by a distance of `4xx10^(-10)` m is situated in an electric field of intensity `3xx10^(5) NC^(-1)` at an angle of `30^(@)` with the field. Calculate the diople moment and the torque acting on it. Charge e on an electron `= 1*6xx10^(-19) C.`

Answer 1

Here, `q = 1*6xx10^(-19) C,`
`2a = 4xx10^(-10) m, E = 3xx10^(5) NC^(-1), theta = 30^(@)`
`p = qxx2a = 1.6xx10^(-19)xx4xx10^(-10) `
`= 6*4xx10^(-29) Cm`
`tau = pE sin theta = 6*44xx10^(-29)xx3xx10^(5)xxsin 30^(@)`
`= 9*6xx10^(-24) Nm`