Analog Electronics
The voltage across the zener resistance is usually

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

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Analog Electronics
The common-source JFET amplifier has

  a high input impedance and a voltage gain less than 1.
  no voltage gain.
  a very high input impedance and a relatively low voltage
  a high input impedance and a very high voltage gain.

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