Question

What circuit arrangement does a person walk through in a metal detector doorway?

Options

• A pure resistive circuit with no capacitor.

• A coil of many turns connected to a capacitor tuned to resonance.

• A transmission circuit with a low power factor.

• A capacitor disconnected from the coil.

Answer 1

The doorway contains a coil of many turns. The coil is connected to a capacitor tuned to resonance.