Analog Electronics
With both bases grounded, the only offset that produces an error is the

  input bias current.
  input offset current.
  β.
  input offset voltage.

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Analog Electronics
The common-source JFET amplifier has

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

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