9.10 electrical power Flashcards
1
Q
What are the equations for power (4)?
A
2
Q
What does this equation fundamentally mean?
P=IV
A
As the current or p.d increases then the more power is being transferred
3
Q
What is the equation for the energy transferred in electrical circuits?
A
4
Q
What is the kilowatt hour?
A
A unit of energy equal to 1kW of power usage for 1 hour
A.k.a the “unit”
5
Q
How many joules are in 1 kilowatt hour
A
6
Q
A
7
Q
When is there maximum power in a circuit (with internal resistance)?
A
When R = r
8
Q
When is there maximum power in a circuit (with internal resistance)?
A
When R = r
