Q 12-07-101JEE MainJEE Main 2022 (25 Jul, Shift 2)Easy
When you walk through a metal detector carrying a metal object in your pocket, it raises an alarm. This phenomenon works on
Answer: (B) Resonance in ac circuits
A metal detector contains a coil in a tuned AC circuit at resonance. A metal object changes the impedance of the circuit, pulling it off resonance; the resulting change in current sets off the alarm.
Solution by Sreeraj P, M.Sc Physics