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What is the value of drain current when Vgs=pinch off voltage?

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What is the value of drain current when Vgs=pinch off voltage?

(a) 0A

(b) 1A

(c) 2A

(d) Cannot be determined

The question was asked during a job interview.

This key question is from The Junction Field-Effect Transistor in chapter Field-Effect Transistors of Electronic Devices & Circuits

1 Answer

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Best answer
The correct answer is (a) 0A

The explanation: ID = IDSS (1-Vgs/Vp)^2

If  Vgs = Vp,then

ID = IDSS (1-1)=0.

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