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Frage 273

What is the function of a power supply bleeder resistor?

  1. It acts as a fuse for excess voltage
  2. It discharges the filter capacitors when power is removedRichtige Antwort
  3. It removes shock hazards from the induction coils
  4. It eliminates ground loop current

Erklärung

Filter capacitors can hold a lethal charge long after the supply is switched off, so a bleeder resistor is connected across them to drain that charge through a known path. It is a safety discharge path, not a fuse or an overvoltage protector.

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Frage 273: What is the function of a power supply bleeder resistor? · FCC General Class (Element 3) · Questena