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Frage 180

What is a possible cause of high voltages that produce RF burns?

  1. Flat braid rather than round wire has been used for the ground wire
  2. Insulated wire has been used for the ground wire
  3. The ground rod is resonant
  4. The ground wire has high impedance on that frequencyRichtige Antwort

Erklärung

A ground wire is only a ground at frequencies where its impedance is low, and at HF a wire of appreciable length has substantial inductive and transmission-line impedance. RF current flowing through that impedance develops a voltage across it, and that voltage appears on the equipment where it can cause burns.

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Frage 180: What is a possible cause of high voltages that produce RF… · FCC General Class (Element 3) · Questena