Current in Circuits Flashcards

All 3 cards in this deck

What two things must a circuit have for there to be a current in it?

A complete (closed) circuit and a source of potential difference.

What does it mean that current is conserved at a junction?

The total current into a junction equals the total current out of it.

True or false? Current is used up as it passes through a lamp.

False. Current is conserved — the same current leaves the lamp as enters it; energy is transferred, not current.