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://wonderopolis.org/wonder/How-Do-Metal-Detectors-Work.