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KVPY2015PhysicsSemiconductors

A donor atom in a semiconductor has a loosely bound electron. The orbit of this electron is considerably affected by the semiconductor material but behaves in many ways like an electron orbiting a hydrogen nucleus. Given that the electrons has an effective mass of 0.07 ~m (where m _ e is mass of the free electron) and the space in which it moves has a permittivity 13 ₀ , then the radius of the electrons lowermost ene

Options

  1. A0.53 Å
  2. B243 Å
  3. C10 Å
  4. D100 Å

Correct answer

D. 100 Å

Step-by-step solution

M V² r = K Q² r² & M V r= n h 2 Using data given in question r =100 Å

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