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Q1:
The JFET in the circuit shown in figure has an IDSS = 10 mA and Vp = -5 V. The value of the resistance Rs for a drain current IDS = 6.4 mA is (select the nearest value)

A 150 Ω

B 150 Ω

C 560 Ω

D 1 kΩ

ANS:A - 150 Ω

6.4 x 10-3 = 10 x 10-3 = 0.8 = 0.8 - 1 = - 0.2 VGS = -5 x 0.2 = -1 V IDSRS = -VGS = - (-1) = 1 = 0.156 x 103 = 156 Ω.



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