When you walk through a metal detector carrying a metal object in your pocket, it raises an alarm. This phenomenon works on
Select the correct option:
A
Electromagnetic induction
B
Resonance in ac circuits
C
Mutual induction in ac circuits
D
interference of electromagnetic waves
✓ Correct! Well done.
✗ Incorrect. Try again or view the solution.
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.
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