Analog Electronics
The depletion region with in a pn junction is reduced when the junction has :

 zero bias.
 all of these.
 reverse bias.
 forward bias.

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Analog Electronics
Conventional biasing of a BJT has

  EB reversed biased and CB forward biased.
  EB forward biased and CB forward biased.
  EB reversed biased and CB reversed biased.
  EB forward biased and CB reversed biased.

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Analog Electronics
Voltage Series (feedback also called series-shunt feedback) results in

Increase in input impedance & decreases in output impedance
Decrease in input impedance & increase in output impedance
Increase in both input & output impedances
Decreases in both input & output impedances

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