The cut-off frequency of a JFET is that time when the magnitude of the input current is ___________(a) Greater than the output current(b) Less than the output current(c) Equal to the output current(d) Twice the output currentI have been asked this question by my college professor while I was bunking the class.The doubt is from Characteristics of JFET topic in section FET Amplifiers of Analog Circuits

The cut-off frequency of a JFET is that time when the magnitude of the

1.	The cut-off frequency of a JFET is that time when the magnitude of the input current is ___________(a) Greater than the output current(b) Less than the output current(c) Equal to the output current(d) Twice the output currentI have been asked this question by my college professor while I was bunking the class.The doubt is from Characteristics of JFET topic in section FET Amplifiers of Analog Circuits
Answer» Correct option is (c) Equal to the output current For explanation I WOULD say: The cut-off FREQUENCY is an important FEATURE of the JFET due to the PRESENT of capacitive effects. It has been seen that the output current becomes a function of frequency in high-frequency applications and hence we have to choose a cut-off frequency so that the output current is equal to the input current.

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