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Flashcards in The Cost of Electricity Deck (7)
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1
Q

What do electrical appliances do?

A

Transfer electrical energy into other forms

2
Q

What is the equation for energy (using power)? Units

A

E = P * t
Energy = Power * time
J = W * s
or kWh = kW * hour

3
Q

What is the standard unit for energy?

A

kWh

4
Q

When would you use kW rather than W?

A

When you have a large amount of energy eg, how much is used in a home in a week

5
Q

What are the 2 Formulas needed for calculating the cost of electricity?

A

1) No. of units (kWh) used = Power (kW) * Time (hours)

2) Cost = No. of units * Price per Unit

6
Q

Do you have to have a integer value of units when working out cost?

A

No!!

7
Q

What should you check when reading electricity meters?

A

The units.

kWh?