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In Bohr model of hydrogen atom , the ele...

In Bohr model of hydrogen atom , the electron `0.5Å` at a frequency of `6.8 xx10^15` rev/s. The magnetic field at the centre and magnetic moment will be

A

`14T,9xx10^-24Am^2`

B

`7T,9xx10^-24Am^2`

C

`14T,7xx10^-24Am^2`

D

`7T,14xx10^-24Am^2`

Text Solution

Verified by Experts

The correct Answer is:
A
`B=(mu_0I)/(2 pi a) (I=(q)/(T)=ef)`
`B=(mu_0 ef)/(2a) =14 T`
`M=n I A , n=1, A = pi r^2`
`=9xx10^-24 Am^2`.
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