Analog Electronics
Feedback circuit in an oscillator can be accomplished by

 Any one or combinations of the above methods
 Inductive coupling between input and output
 Capacitive coupling between input and output
 Resistive coupling between input and output

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

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Analog Electronics
In a transistor amplifier, the reverse saturation electric current ICO

  double for every 5° rise in temperature.
  double for every 10° rise in temperature.
  double for every 1° rise in temperature.
  increase linearly with the temperature.

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