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Frage 251

Which of the following is a reason to use shielded wire?

  1. To decrease the resistance of DC power connections
  2. To increase the current carrying capability of the wire
  3. To prevent coupling of unwanted signals to or from the wireRichtige Antwort
  4. To reduce receiver overload

Erklärung

The grounded conductive shield around the inner conductor intercepts electric fields, so unwanted signals neither radiate out of the wire nor couple into it. Shielding does not change the DC resistance or the current-carrying capacity of the conductor inside.

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Frage 251: Which of the following is a reason to use shielded wire? · FCC Technician Class (Element 2) · Questena