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Electronics and Communication Engineering - Electronic Devices and Circuits - Discussion

Discussion Forum : Electronic Devices and Circuits - Section 3 (Q.No. 33)
Electronic Devices and Circuits
33.

Assertion (A): When reverse voltage across a p-n junction is increased, the junction capacitance decreases.

Reason (R): Capacitance of any layer is inversely proportional to thickness.

Both A and R are true and R is correct explanation of A
Both A and R are true but R is not a correct explanation of A
A is true but R is false
A is false but R is true
Answer: Option
Explanation:

Increase in reverse voltage increases the width of depletion layer and decrease of capacitance of layer.

Discussion:
1 comments Page 1 of 1.
Prakash said:   10 years ago
If reverse bias increases, the width of depletion region increases. The depletion region acts as a parallel plate capacitor.

C = Σ*A/d.

d = Distance between plates.

So capacitance decreases.
(1)
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