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Physics Question on Magnetism and matter

When you walk through a metal detectorcarrying a metal object in your pocket, itraises an alarm This phenomenon works on

A

Electromagnetic induction

B

Resonance in ac circuits

C

Mutual induction in ac circuits

D

interference of electromagnetic waves

Answer

Resonance in ac circuits

Explanation

Solution

Metal detector works on the principle of transmitting an electromagnetic signal and analyses a return signal from the target. So it works on the principle of resonance in AC circuit.

Hence, the correct option is (B):Resonance in ac circuits\text{Hence, the correct option is (B):}\text{Resonance in ac circuits}