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Question

Which of the following materials can be detected by a metal detector?

A
Gold
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B
Plastic
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C
Steel
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D
Paper
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Solution

The correct options are
A Gold
C Steel
Electromagnets are used in metal detector. Metal detectors are used for security purposes at many places i.e, airports, railway stations etc. They are also used in food industry to detect small metallic particles mixed up with food particles.

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