Electrical Power Flashcards
1
Q
Define ‘Electrical Power’
A
- The rate at which an appliance transfers energy
2
Q
An appliance with a high power rating does what?
A
- Transfers a lot of energy in a short period of time
3
Q
Where does the energy come from for this appliance?
A
- The energy which is flowing through it
4
Q
So what can we conclude from an appliance with a high power rating?
A
- That it will draw a large current from the supply
5
Q
What is the formula for electrical power?
A
- Potential difference x Current
6
Q
The energy transferred by an appliance depends on what?
A
- The current through it
- The voltage supplied
- How long it is on for
7
Q
What is the formula for working out energy transferred?
A
- Current x Potential Difference
