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The diode test function of a digital multimeter displays

  • A.the forward voltage drop of the junction
  • B.the reverse leakage current of the junction in microamperes
  • C.the resistance of the junction in the forward direction
  • D.the breakdown voltage at which the junction begins to conduct

Answer: A

A small current is passed and the resulting voltage displayed, so a silicon junction reads about 0.6 V and a light emitting diode rather more. The ohms function is unsuitable because a junction has no single resistance.

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