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Electronics and Communication Engineering - Electronic Devices and Circuits - Discussion

Discussion Forum : Electronic Devices and Circuits - Section 2 (Q.No. 17)
Electronic Devices and Circuits
17.
If the reverse voltage across a p-n junction is increased three times, the junction capacitance
will decrease
will increase
will decrease by an approximate factor of about 2
will increase by an approximate factor of about 2
Answer: Option
Explanation:

Increase of reverse voltage widens the depletion layer and junction capacitance decreases. However the decrease in capacitance is not proportional to increase in voltage.

Discussion:
4 comments Page 1 of 1.
Shadan said:   8 years ago
The applied voltage is inversely proportional to junction capacitance formed in a PN junction diode under reverse bias condition.
Usman Ali Shah said:   5 years ago
Junction capacitance or Transition capacitance Ct is inversely proportional to (junction voltage) ^1/2.
Shadan said:   8 years ago
Q=CV.
or
C=Q/V.
therefore voltage increases capacitance decrease.
Saladi eswara vimalakar said:   6 years ago
How it is decreased by 2?
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