WONDER #1021: How Do Metal Detectors Work?

Question 1 of 3

What device is used to detect metal objects hidden from sight?

  1. metal detector
  2. yardstick
  3. tuning fork
  4. GPS

Question 2 of 3

Very low frequency technology is also known as what?

  1. VLF
  2. electromagnetic field
  3. WiFi
  4. none of the above

Question 3 of 3

Metal detectors work by detecting a metal object’s what?

  1. very low frequency
  2. hardness
  3. magnetic field
  4. atomic number

Check your answers online at https://www.wonderopolis.org/wonder/how-do-metal-detectors-work.