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
Answer:A
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
Explanation: A potential difference is established across the junctions due to recombination of holes & electrons. This growing filed (barrier potential) stops the further diffusion.