Analog Electronics
In modern the MOSFET, the material used for the gate is

  high - purity silicon.
  high - purity silica.
  heavily doped poly crystalline silicon.
  epitaxially grown silicon.

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

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

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