WONDER #1510: How Does an Invisible Fence Work?

Question 1 of 3

Which of the following is a key component of an invisible fence system that’s worn on a pet’s collar?

  1. transmitter
  2. radio
  3. receiver
  4. collar

Question 2 of 3

What type of signal does an invisible fence transmitter emit?

  1. radio
  2. stereo
  3. electrical
  4. nuclear

Question 3 of 3

Wireless invisible fence systems create a “safe zone” in what shape?

  1. square
  2. circle
  3. trapezoid
  4. helix

Check your answers online at https://wonderopolis.org/wonder/how-does-an-invisible-fence-work.