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Homework Help: Magnetic Moment and Principal Quantum No of electron

  1. Mar 25, 2015 #1
    1. The problem statement, all variables and given/known data
    The magnetic moment of a revolving electron around the nucleus varies with principal quantum number as ?

    2. Relevant equations
    mvr = nh/2π

    3. The attempt at a solution
    i know μ = (qωr2 )/ 2

    and after that i am substituting values for r and i get μ∝ n2 but that is wrong.Help !
  2. jcsd
  3. Mar 26, 2015 #2

    Simon Bridge

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    Homework Helper

    Welcome to PF;
    How do you know it's wrong?

    Doesn't v vary with n also?
  4. Mar 30, 2015 #3
    Well it was a MCQ ...the answer is μ ∝ n .

    I got it though . Yup , v ∝ 1/n and r ∝ n2 . [ r = 0.529 n2 / Z Angstrom & v = 2.1 x 106 x Z / n m/s ]

    Damn , this was an easy one , should have got it right in the first place ..!
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