Analog Electronics
When a reverse bias is applied to a diode, it will

  increases the majority carrier an electric current greatly.
  lower the potential barrier.
  raise the potential barrier.
  none of these.

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Analog Electronics
When a transistor is connected in common emitter mode, it with have

Medium input resistance and high output resistance
Low input resistance as well as output resistance
Negligible input resistance and high output resistance
High input resistance and low output resistance

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