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The built-in barrier potential in a N-channel JFET is ___________

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The built-in barrier potential in a N-channel JFET is ___________

(a) less than the internal pinch-off voltage

(b) equal to the internal pinch-off voltage

(c) greater than the internal pinch-off voltage

(d) not related to the internal pinch-off voltage

I have been asked this question by my college professor while I was bunking the class.

Query is from Characteristics of JFET topic in section FET Amplifiers of Analog Circuits

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The correct option is (a) less than the internal pinch-off voltage

For explanation: Pinch-off would require more voltage than the voltage required to establish the p-n barrier voltage. This is evident from the dependence of such voltage on the doping concentration.

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