Question

For RC amplifier, Capacitance Cbc is that of the depletion region at the reverse-biased base-collector junction and is only a few… unit what?​

Answer 1

Here, a n-p-n transistor is working as an amplifier in CE configuration. Hence, first junction n-p is forward biased and second junction p-n is reverse biased. The separation between plates (depletion region) depends on forward and reverse voltage. Thus, their capacitance

C

1

and

C

2

depends on the applied voltages.

Hence,

C

1

C