P1.3 ELECTRICAL ENERGY

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  • Created by: 12dalel
  • Created on: 11-11-16 16:59
What is power?
The amount of energy we transfer per second
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What do we measure power in?
Watts
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Equation for calculating power
Power= Energy/Time
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Equation for efficiency
Useful power out/ Total power in x100
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What is the kilowatt-hour?
The amount of energy transferred to a 1 kilowatt appliance in an hour
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How to work out kilowatt- hours
kWh (E)= Power x time (in hours)
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What is payback time?
How long it takes to save the same amount of money as the appliance cost
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Other cards in this set

Card 2

Front

What do we measure power in?

Back

Watts

Card 3

Front

Equation for calculating power

Back

Preview of the front of card 3

Card 4

Front

Equation for efficiency

Back

Preview of the front of card 4

Card 5

Front

What is the kilowatt-hour?

Back

Preview of the front of card 5
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