Practice question

A loop with three turns of 14 AWG XHHW measures roughly 100 microhenries on the bench. Typical recommended loop inductance for vehicle detection is approximately:

  1. Less than 1 microhenry
  2. Between 50 and 500 microhenries (with lead-in and combined inductance in the detector's tuning range)
  3. Between 5 and 50 henries
  4. Above 10 millihenries

Answer: B — Between 50 and 500 microhenries (with lead-in and combined inductance in the detector's tuning range)

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