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HouseholdElectricity

# HouseholdElectricity - Chapter5 Visit...

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Chapter 5 Using Electricity in the Home Visit www.worldofteaching.com For 100’s of free powerpoints

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Work = force (Newtons) X distance (m) In order to do work a force must  move  through a distance.  Kinetic energy involves movement or use Potential energy means that it can be used On Earth we can convert our weight in  kilograms  to Newtons by multiplying by 10      i.e.. One kilogram becomes 10 N
Energy = Voltage X Current X  time The units for energy are joules (J) Power = energy / time Power = Voltage (v)  X Current (I)

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House Hold Energy  Consumption Hydro bills are established by finding  out how many kilowatt hours of  electricity your household has used in a  given time. 1 kWh = kilowatts X time (hours) 1 kWh = 1 000 Watts X 1 hour 1 kWh = 1 000 W X 3 600 seconds
Reading the Meter – always  use the smallest number

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Efficiency This is a comparison of the amount of  energy obtained as compared to the  amount of energy put into the system Efficiency = energy output / energy input To convert it to a percentage just multiply  the answer by 100 %

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House Hold Wiring The wires coming into a house include a black, a  red and a white.
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