Analog Electronics
The magnitude of electric current ICBO

  increases with the increase in temperature.
  depends largely upon the emitter doping.
  depends largely upon emitter-base junction base potential.
  is generally greater in silicon than in germanium transistor.

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Analog Electronics
Pinch-off voltage in a JFET is

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

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