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

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

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Analog Electronics
Pinch-off voltage in a JFET is

 the drain voltage that gives zero drain current.
 the drain voltage that gives infinite drain current.
 the gate to source voltage that gives unity drain current.
 the gate to source voltage that gives zero drain current.

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