Analog Electronics
The input offset electric current is usually

  less than the input offset voltage.
  less than the input bias current.
  unimportant when a base resistor is used.
  equal to zero.

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Analog Electronics
The common-source JFET amplifier has

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

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