Analog Electronics
The common-source JFET amplifier has

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

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Analog Electronics
For an NPN transistor in normal bias

  only majority carriers cross the collector junction.
  Je is forward biased and Jc is reverse biased.
  the emitter junction has high resistance.
  only holes cross the collector junction.

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