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प्रश्न
What circuit arrangement does a person walk through in a metal detector doorway?
पर्याय
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.
MCQ
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उत्तर
The doorway contains a coil of many turns. The coil is connected to a capacitor tuned to resonance.
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