Analog Electronics
A transistor series voltage regulator is called emitter follower regulator because the emitter of the pass transistor follows the ________________________ voltage.

  input.
  output.
  base.
  collector.

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Analog Electronics
Pinch-off voltage in a JFET is

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

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