Analog Electronics
Conduction electrons have more mobility than holes because they

 have negative charge
 need less energy to move them
 are free
None of these

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Analog Electronics
The common-source JFET amplifier has

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

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