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COMEDK2018PhysicsSemiconductors

In an unbiased p - n junction

Options

  1. Apotential at p is more than that at n
  2. Bpotential at p is less than that at n
  3. Cpotential at p is equal to that at n
  4. Dpotential at p is + ve and that at n is - ve

Correct answer

B. potential at p is less than that at n

Step-by-step solution

An unbiased p - n junction is shown below. From the diagram, it is clear that in depletion region, n -side has immobile positive charge, whereas p -side has immobile negative charge. Therefore, potential at n is less than that of n .

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