Electronic Devices and Circuits - Engineering

Q1:

If the reverse voltage across a p-n junction is increased three times, the junction capacitance

A will decrease

B will increase

C will decrease by an approximate factor of about 2

D will increase by an approximate factor of about 2

ANS:C - will decrease by an approximate factor of about 2

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