13b_current - 13b: Electric Current When a conductor is...

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13b: Electric Current When a conductor is connected between both terminals of a battery it forms an electric circuit . A circuit must be a complete, unbroken loop connecting one terminal of a battery (or other source of voltage) to the other. A battery is commonly shown in a circuit diagram , since they are easy to handle in real life and do not complicate the situations we will look at. In the circuit diagrams (aka “ schematics ”) a battery is shown as two parallel lines, one longer than the other. The longer line is the positive terminal and the shorter line is the negative terminal. The battery in a circuit will cause charge to flow from one terminal to another. .. this is called electric current . A more precise definition is the amount of charge that passes a given point in a certain amount of time. This leads to the basic formula for current that you will use: I avg = Q t I avg = current in amperes (A) ΔQ = charge in coulombs (C) Δt = time in seconds (s)
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13b_current - 13b: Electric Current When a conductor is...

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