Analog Electronics
The most commonly used transistor circuit arrangement is

None of these
  common base.
  common emitter.
  common collector.

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Analog Electronics
In a transistor amplifier, the reverse saturation electric current ICO

  increase linearly with the temperature.
  double for every 5° rise in temperature.
  double for every 10° rise in temperature.
  double for every 1° rise in temperature.

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