Analog Electronics
When the diode is forward biased, it is equivalent to

None of these
  an off switch.
  a high resistance.
  an on switch.

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Analog Electronics
The magnitude of electric current ICBO

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

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