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Question

The magnetic moment (μ) of an electron revolving around the nucleus, varies with principal quantum number n as,

A
μn
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B
μ1n
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C
μn2
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D
μ1n2
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Solution

The correct option is A μn
Magnetic moment (μ of a revolving electron around the nucleus varies with principle quantum number as,
μn=eL2m
According to second postulate of Bohr's theory,
L=nh2π

μ=enh4πm

Here, e charge of an electron
n principle quantum number
h Plank's constant
m mass of electron

So, we can write, μn

Hence, (A) is the correct answer.
Why this question ?
This question is based on magnetic moment of an electron revolving around the nucleus and angular momentum of an electron in the nth orbit.

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