Analog Electronics
Under normal reverse bias voltage applied to diode, the reverse electric current in Si diode

  order of micro A.
  100 mA.
  1000 micro A.
  none of them.

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Analog Electronics
A working diode must have

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

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

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

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