Analog Electronics
Which of following is not an essential element of a DC power supply?

  Rectifier.
  Voltage regulator.
  Voltage amplifier.
  Filter.

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Analog Electronics
The magnitude of electric current ICBO

  is generally greater in silicon than in germanium transistor.
  increases with the increase in temperature.
  depends largely upon the emitter doping.
  depends largely upon emitter-base junction base potential.

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