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8.2 Electric Current
Electric circuit = A complete pathway that allows electrons to flow.
Devices (loads) in the circuit that convert electricity to other forms of energy.
See pages
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Basic Circuit Components
Source: source of energy
Conductor: wire where current flows
Load: turns electricity into other forms
Switch: turns circuit on or off
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Symbols for schematic diagrams:
Example:
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Current Flow
Current electricity = The continuous flow of charge in a complete circuit.
Current = the amount of charge passing a point in a conductor every second.
Measured using an ammeter
Measured in amperes (A)
See pages
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6. Conventional Current
The flow of electricity is from negative to positive (the flow of electrons).
In earlier days, scientists mistakenly believed electricity flowed from positive to negative.
Descriptions of this flow from positive to negative still exists today = conventional current
Take the Section 8.2 Quiz