Analog Electronics
In a MOSFET, the polarity of the inversion layer is the same as that of the

  charge on the gate electrode.
  majority carries in the source .
  majority carries in the substrate.
  minority carriers in the drain .

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

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

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