In a JFET amplifier, VGS = -5 V, IG = 0 mA, and ID = IS = 5mA. Which of the following statements is true?
A) The gate terminal of the JFET is probably open.
B) The gate-source junction of the JFET is probably shorted.
C) The drain terminal of the JFET is probably open.
D) The readings do not indicate that any problem exists.

Question

Quizplus · Accepted Answer

The given conditions (VGS = -5 V, IG = 0 mA, and ID = IS = 5mA) are typical for a normally operating JFET, indicating no problem exists. JFETs are designed to have a gate current (IG) of nearly 0 mA due to the reverse-biased gate-source junction, and a negative gate-source voltage (VGS) for normal operation in depletion mode.

In a JFET Amplifier, VGS = -5 V, IG =