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  1. 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)

    2. A.
    150 Ω
    B.
    150 Ω
    C.
    560 Ω
    D.
    1 kΩ

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    Answer : Option A

    Explanation :

    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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