P2 - Fuels for power Flashcards
1
Q
What does the cost of using an electrical appliance depend on?
A
- its power rating
- how long it is used for
2
Q
What is the formula for energy supplied?
A
Energy supplied = power x time
3
Q
What is the units for energy supplied?
A
Kilowatt hours (kWh)
4
Q
What is the equation for working out cost?
A
Cost = energy x cost per kilowatt hour
5
Q
What are the benefits of off-peak electricity for the producer?
A
They can avoid start up costs.
6
Q
What are the three fossil fuels?
A
- coal
- oil
- gas
7
Q
What is the equation for power?
A
Power = voltage x current
8
Q
What does a transformer do?
A
A transformer increases voltage but decreases current which keeps the power the same but reduces energy loss.
