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Orbital acceleration of electron is

  1. fraction numerator straight n squared straight h squared over denominator 4 pi squared straight m squared straight r cubed end fraction    
  2. fraction numerator n squared h squared over denominator 2 n squared r cubed end fraction
  3. fraction numerator 4 n squared h squared over denominator pi squared m squared n cubed end fraction    
  4. fraction numerator 4 n squared h squared over denominator 4 pi squared m squared r cubed end fraction    

The correct answer is: fraction numerator straight n squared straight h squared over denominator 4 pi squared straight m squared straight r cubed end fraction


    mvr equals fraction numerator nh over denominator 2 pi end fraction not stretchy rightwards double arrow straight v equals fraction numerator nh over denominator 2 pi mr end fraction not stretchy rightwards double arrow straight v squared over straight r equals fraction numerator straight n squared straight h squared over denominator 4 pi squared straight m squared straight r cubed end fraction

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