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

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

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Analog Electronics
For transistor action

  the emitter should be heavily doped.
  Je must be forward biased and Jc should be reverse biased.
  the base region must be very thin and lightly doped.
  all of these.

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