Joule’s law
Three friends are arguing with each other. Aidan says that a battery will send the same current to any circuit you connect to it. Cathy says that the battery will produce the same potential difference at its terminals independent of the circuit connected to it. Eugenia says that the battery will always produce the same electric power independent of the circuit connected to it. Describe experiments that you can perform to convince all of them that their opinions are wrong in at least one situation.
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