Power Of Electrical Applinces Flashcards
1
Q
Why does a moving charge transfer energy
A
Because the charge does work against the resistance of the circuit
2
Q
What are electrical appliances designed to do
A
Transfer energy to components in the circuit when a current flows
Eg kettle, hand fan
3
Q
What does the total energy transfer by an appliance depend on
A
How long the appliance is on for and it’s power
4
Q
What does it mean when the more energy is transferred in a given time
A
Higher its power
5
Q
What is the formula for energy transferred by electrical work
A
Power x time
Power: watts W
Time: s
Energy transferred: joules
6
Q
What is a power rating
A
Tells you the maximum amount of energy transferred between slotted per second when the appliance is in use
