Analog Electronics
Pinch-off voltage in a JFET is

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

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Analog Electronics
A Semiconductor has a

 Negative Temperature coefficient of resistance
 Positive Temperature coefficient of resistance
None of these
 Constant Temperature coefficient of resistance

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Analog Electronics
For an NPN transistor in normal bias

  Je is forward biased and Jc is reverse biased.
  the emitter junction has high resistance.
  only majority carriers cross the collector junction.
  only holes cross the collector junction.

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