WONDER #1021: How Do Metal Detectors Work?
Question 1 of 3
What device is used to detect metal objects hidden from sight?
- metal detector
- tuning fork
Question 2 of 3
Very low frequency technology is also known as what?
- electromagnetic field
- none of the above
Question 3 of 3
Metal detectors work by detecting a metal object’s what?
- very low frequency
- magnetic field
- atomic number
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