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

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

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Analog Electronics
In all base driver amplifiers

None of these
ac emitter voltage is 180° out of phase with ac base voltage
ac collector voltage is in phase with ac base voltage
ac collector voltage is 180° out of phase with ac base voltage

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