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

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

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Analog Electronics
A working diode must have

 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
 High resistance when forward biased, while low resistance when reverse bias

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