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Whether the topic is popcorn or particle physics, you can count on BrainStuff to explore -- and explain -- the everyday science in the world around us.

What do the yellow and black wires in a home telephone jack do?

October 27th, 2008

Episode 104 of 1127 episodes

It only takes two wires to connect a phone, but most house wiring contains four wires. Check out this HowStuffWorks podcast to learn why.

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