Analog Electronics
A quartz crystal oscillator consists of

 neither series nor parallel frequency.
 only series resonant frequency.
 both series and parallel frequencies.
 only parallel resonant frequency.

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Analog Electronics
A working diode must have

 Low resistance when forward or reverse biased
 High resistance when forward biased, while low resistance when reverse bias
 High resistance when forward or reverse biased
 Low resistance when forward biased, while high resistance when reverse bias

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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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