Analog Electronics
A zener diode

  has a barrier potential of 1 V.
  is forward biased.
  is a battery.
  has a constant voltage in the breakdown region.

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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.
  minority carrier flow in the emitter region.
  majority carrier flow in the emitter region.

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