Avalanche breakdown in a PN junction diode is due to - Vidyadip

MCQ

Avalanche breakdown in a $PN$ junction diode is due to

A
Sudden shift to Fermi level
B
Increase in the width of forbidden gap
C
Sudden increase of impurity concerntration
✓
Cumulative effect of increased electron collision and creative of added electron hole pairs

✓

Answer

Correct option: D.

Cumulative effect of increased electron collision and creative of added electron hole pairs

d
The avalanche breakdown in $p$$-n$ junction is due to cumulative effect of conduction band electron. In reverse bias, due to applied electric field, electrons acquire enough energy to free more electron bound to the atom.The abundant number of electron-hole pairs are created for conduction, this is cumulative effect.

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