Analog Electronics
Colpitts oscillator is also called as

 Tank circuit oscillator
 Resonant circuit oscillator
All of these
 LC oscillator

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

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

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