Which of the following is true in case of an unbiased p-n junction diode? a) Diffusion does not take place b) Diffusion of electrons & holes goes on infinitely c) There is zero electrical potential across the junctions d) Charges establish an electric field across the junctions
Which of the following is true in case of an unbiased p-n junction diode? a) Diffusion does not take place b) Diffusion of electrons & holes goes on infinitely c) There is zero electrical potential across the junctions d) Charges establish an electric field across the junctions
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Answer: d
Explanation: A potential difference is established across the junctions due to recombination of holes & electrons. This growing filed (barrier potential) stops the further diffusion.