Analog Electronics
The voltage across the zener resistance is usually

  measured in volts.
  large.
  subtracted from the breakdown voltage.
  small.

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Analog Electronics
Pinch-off voltage in a JFET is

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

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