Analog Electronics
The diffusion capacitance of a forward biased P+N junction diode with a steady electric current I depends on

  junction area.
  mean life time of the electrons.
  mean life time of the holes.
  width of the depleted region.

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Analog Electronics
Conventional biasing of a BJT has

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

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