Analog Electronics
The depletion region of a pn junction is one, that is depleted of

  mobiles charges.
  immobile charges.
  velocity of the carriers.
  atoms.

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Analog Electronics
For an NPN transistor in normal bias

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

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Analog Electronics
The common-source JFET amplifier has

  no voltage gain.
  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.

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