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The phenomenon which makes metal detector alarm is?

(a) Hall effect

(b) EMI

(c) Interference of EM waves

(d) Gauss law

1 Answer

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Best answer

Correct option is (b) EMI

The operation of metal detectors is based upon the principles of electromagnetic induction. Metal detectors contain one or more inductor coils that are used to interact with metallic elements on the ground.

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