When you walk through a metal detector carrying a metal object in your pocket, it raises an alarm. This phenomenon works on

Question

When you walk through a metal detector carrying a metal object in your pocket, it raises 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

Tardigrade Admin · Accepted Answer

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.

Q. When you walk through a metal detector carrying a metal object in your pocket, it raises an alarm. This phenomenon works on

Electromagnetic induction

Resonance in ac circuits

Mutual induction in ac circuits

interference of electromagnetic waves

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 $A C$ circuit.