First slide

P-N junction

Question

Zener break down will occur if

Easy

A

impurity level is low
B

impurity level is high
C

impurity level is less in n - side
D

impurity level is less in p - side

Solution

(2)
In a highly doped p - n junction, thickness of depletion layer is very small. As a result intensity of electric field with in the depletion layer is very high and this highly intense electric field directly pulls electron from co-valent bonds and Zener break down takes place.

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