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# Electric Circuits

## A closed loop through which current can flow.

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Electric Current and Circuits

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### Electric Current

An electric current is a stream of charged particles. Are the particles in an electric current positively or negatively charged?

Conventional current is the direction the positive current would flow. Beware! Conventional current is used when discussing the movement of the current but the idea that a positive charges can flow through a wire is incorrect.

In what direction do electric currents flow?

### Electric Circuits

[Figure1]

What is an electric circuit and what components are needed for the most basic circuit?

In a circuit, any device that resists the flow of the current is said to have resistance.

What are the units of electric currents?

What is voltage and what is electric potential energy? How are these related to electric currents?