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If the angular momentum of an electron is Error converting from MathML to accessible text. then the magnitude of the magnetic moment will be

  1. fraction numerator e J over denominator m end fraction    
  2. fraction numerator e J over denominator 2 m end fraction    
  3. eJ 2m    
  4. fraction numerator 2 m over denominator e J end fraction    

The correct answer is: fraction numerator e J over denominator 2 m end fraction


    As we know for circulating electron magnetic moment
    M equals fraction numerator 1 over denominator 2 end fraction e v r ...... (i)
    and angular momentum J equals m v r ...... (ii)
    From equation (i) and (ii) M equals fraction numerator e J over denominator 2 m end fraction

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