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At an airport, a person is made to walk through the door way of metal detector, for security reasons. If she/he is carrying anything made of metal, the

metal detector emits a sound. On what principle does this work?...Explain. plzz



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The metal detector has a magnetic field around it. Only metals tend to disrupt this magnetic field. As a result, when metals do disturb the magnetic field, an alarm gets activated.
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