In a hydrogen atom , the electron atom makes a transition from `n = 2 to n = 1`. The magnetic field produced by the circulating electron at the nucleus

Options

A. decrease 16 time
B. increase 4 time
C. decrease 4 time
D. increase 32 time

Answer

D

Explanation

`B = (mu_(0) l)/(2 r) and l = (e)/(T)`
`B = (mu_(0) e)/(2 r T)` `[r prop n^(2), T prop n^(3)]`
`B prop (1)/(n^(5))`