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Analog Electronics

Analog Electronics
The majority carriers in the emitter of a PNP transistor are

 pentavalent atoms.
 trivalent atoms.
 holes.
 free electrons.

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Analog Electronics
Barrier potential at the temperature (25°C) is 0.7 V, its value at 125°C is

  0.9 V.
  0.3 V.
  0.5 V.
  0.7 V.

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Analog Electronics
In a properly biased NPN transistor most of the electrons from the emitter

  recombine in the emitter its self.
  are stopped by the junction barrier.
  recombine with holes in the base .
  pass through the base to the collector.

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Analog Electronics
For a reverse biased pn junction, the electric current through the junction increases abruptly at

  7.2 eV.
  0 V.
  breakdown voltage.
  0.2 eV.

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Analog Electronics
In a pnp transistor, the major carriers in the emitter are

  holes.
 free electrons.
 both.
 neither.

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Analog Electronics
If the base resistor is open, what is the collect current?

 10 mA.
  0 mA.
 2 mA.
 1 mA.

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