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Հարց 255

Why should wire-wound resistors not be used in RF circuits?

  1. The resistor’s tolerance value would not be adequate
  2. The resistor’s inductance could make circuit performance unpredictableՃիշտ պատասխան
  3. The resistor could overheat
  4. The resistor’s internal capacitance would detune the circuit

Բացատրություն

A wire-wound resistor is physically a coil, so it has appreciable series inductance whose reactance grows with frequency and makes the part stop behaving like a pure resistance at RF. Overheating and tolerance are not the issue, since wire-wound resistors are usually the more rugged and precise type.

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Հարց 255: Why should wire-wound resistors not be used in RF circuits? · FCC General Class (Element 3) · Questena