Chapter 9.2 Flashcards Preview

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Flashcards in Chapter 9.2 Deck (7)
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Power

Rate of change of energy

Rate work is done

1

Joule

Unit for measuring energy

2

Watt (W)

I joule of energy is used every second

W=J/s

3

Electrical power

Rate at which electricity is being used

P= VI

4

Power rating

How much electrical energy a device uses every second

5

Energy consumption

How much energy is used in the time we use a load

E=Pt. t is in seconds

6

Kilowatt-hour

A practical unit for measuring electrical use

1 kilowatt-hr means 1 kilowatt was used every hour