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Find the gate to source voltage for voltage divider having R1=R2=2KΩ and VDD=12V, ID=1mA and RS=4KΩ?

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Find the gate to source voltage for voltage divider having R1=R2=2KΩ and VDD=12V, ID=1mA and RS=4KΩ?

(a) 3V

(b) 2V

(c) 0V

(d) 1V

This question was posed to me by my school principal while I was bunking the class.

My question is based upon Biasing the FET in portion Field-Effect Transistors of Electronic Devices & Circuits

1 Answer

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Correct answer is (b) 2V

Easy explanation: VG = R2×VDD/R1+R2

=>VG=2×12/4

=>VG=6V

=>VGS=VG-ID Rs

=>VGS=2V.

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