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Science Probe 10 Chapter 5

Using Electricity in Your Home

work =force x distance
The amount of work done is measured inJoules
The rate at which energy is producedis called power
One horesepower is equal to746 Watts.
Voltage =energy divided by charge transferred
Current =Charge transferred divided by time
Efficiency =Energy Output divided by Energy Input
AC frequency is the numberof cycles in a second
In North America AC frequencyis 60 cycles per second
Bi-metallic strips are used incircuit breakers
Bi-metallic strips bend due todifferent coefficients of expansion
Polarized plugs have one prongthat is wider than the other
Electrical Power =Voltage x Current
One hertz is equal toone cycle per second

Squamish, BC

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