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Conductors and Insulators
l  Atoms that give up electrons are called conductors (Gold) l  Atoms that do not give up electrons are called insulators (Plas1c) Parallel Circuits"
•  More than one path for electron flow."
"
-­‐ -­‐ -­‐ -­‐ -­‐ -­‐ -­‐ -­‐ -­‐ -­‐ -­‐ -­‐ -­‐ Series"
•  Provides one path for electron flow"
-­‐ -­‐ -­‐ -­‐ -­‐ -­‐ -­‐ -­‐ -­‐ -­‐ -­‐ -­‐ -­‐ Current
•  Current is the flow of electrons
•  Current is measured in amperes or
amps. for short
•  The electrical symbol is “A”
-­‐ -­‐ -­‐ -­‐ -­‐ -­‐ + + + + + + Voltage
•  Voltage is the measure of electron
pressure
l  Voltage is measured in…VOLTS! l  The electrical symbol is “V” Generator
•  A machine that changes mechanical
energy into electrical energy
•  It must be turned or driven by an outside
source
Electric Motors
A machine that changes electrical energy into
mechanical energy.
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