Analog Electronics
When the diode is forward biased, it is equivalent to

  an on switch.
  a high resistance.
None of these
  an off switch.

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Analog Electronics
A working diode must have

 High resistance when forward or reverse biased
 Low resistance when forward biased, while high resistance when reverse bias
 High resistance when forward biased, while low resistance when reverse bias
 Low resistance when forward or reverse biased

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