Electrical Power and Fuse Ratings Flashcards
1
Q
What is electrical power?
A
The rate at which an appliance transfers energy
2
Q
How much energy does an appliance with a high power raising transfer in a particular time?
A
A lot of energy in a short time
3
Q
Where does this energy come from?
A
The current flowing through it
4
Q
An appliance with a high power rating will…
A
Draw a large current from the supply
5
Q
What is power measured in?
A
Watts (W)
6
Q
What is the equation relating current voltage and electrical power?
A
Electrical power = current x voltage
7
Q
What do most electrical goods show?
A
Their power and voltage rating
8
Q
How should fuses be rated?
A
They should be rated as near as possible but just higher than the normal operating current
9
Q
To work out the fuse what do you need to work out?
A
The current that the item will normally use
