Analog Electronics
In a JFET, the primary control on drain electric current is exerted by

  gate reverse bias.
  voltage drop across channel.
  size of depletion regions.
  channel resistance.

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Analog Electronics
The arrowhead on the transistor symbol points in the direction of

  conventional electric current flow in the emitter region.
  electron flow in the emitter region.
  majority carrier flow in the emitter region.
  minority carrier flow in the emitter region.

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