I’m thinking the connections in Bluetooth speakers for example or pickups on a guitar. In particular I know audio ports typically have a left/right and a ground wire but if this is in a portable Bluetooth speaker that you’re holding how does the ground work in this case?
In: Physics
It uses a battery just like any electronic device. The battery has a positive and negative side. The negative side serves as “ground” DC electricity is different than AC which it what’s used in your house. AC electricity is connected to the ground through wiring.
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