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

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

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Analog Electronics
In all base driver amplifiers

ac collector voltage is 180° out of phase with ac base voltage
ac collector voltage is in phase with ac base voltage
ac emitter voltage is 180° out of phase with ac base voltage
None of these

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