cutoff frequency for given transistor

[electronics_kumar]

for transisitor having a coupling capcaitance of 10 microfarad in output there exists a resistance between this capa and ground ie it is load resiatance of 2k hms.in the collector it is having a resisatance of 3kohms..how to calculate the cutoff frequency

 

[v_c]

The cutoff frequency f_t for a transistor should be given in its datasheet.
This frequency determines the frequency response of the transistor parameters like the current gain β for a BJT.

Are you asking for the corner frequency of the circuit surrounding it? I think a circuit diagram is in order here -- you have not mentioned if you have FET or a BJT. Also, you will need to know the bias points in order to calculate the ac equivalent circuit for the transistor.

 

[flatulent]

I think that you are asking for the low frequency 3 dB point. This is 1/(2piRC) where R is the sum of the resistances connected to both sides of the capacitor.

In your case this is 5 k total so the lower frequency would be 3 Hz.

 

[electronics_kumar]

The cutoff frequency f_t for a transistor should be given in its datasheet.
This frequency determines the frequency response of the transistor parameters like the current gain β for a BJT.

Are you asking for the corner frequency of the circuit surrounding it? I think a circuit diagram is in order here -- you have not mentioned if you have FET or a BJT. Also, you will need to know the bias points in order to calculate the ac equivalent circuit for the transistor.

it composed of BJT...