Analog Electronics
Most of the electrons in the base of an NPN transistor flow

  into the collector.
 into the emitter.
 out of the base lead.
 into the base supply.

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Analog Electronics
Pinch-off voltage in a JFET is

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

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