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As you can't draw here, see link.

  • In the forward bias voltage direction (right side) current slowly rises until the knee is at 0.7V in silicon diodes (0.2V in germanium diodes), then current rapidly rises. The forward biased V:I curve closely approximates an exponential function.
  • In the reverse bias voltage direction (left side) current stays constant at near zero, until the breakdown voltage is reached then jumps to a high value.
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