Analog Electronics
When the JFET is no longer able to control the current, this point is called the

  saturated point.
  pinch-off region.
  depletion region.
  breakdown region.

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Analog Electronics
Pinch-off voltage in a JFET is

 the drain voltage that gives infinite drain current.
 the gate to source voltage that gives zero drain current.
 the drain voltage that gives zero drain current.
 the gate to source voltage that gives unity drain current.

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