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.