Equations For Paper 1: Electricity Flashcards
1
Q
Charge flow =
A
current x time taken
2
Q
Potential difference across a component =
A
energy transferred / charge
3
Q
Total resistance =
A
Is the sum of the resistance of each component in each circuit
4
Q
Current =
A
Potential difference / component resistance
5
Q
(2x equations) Power =
A
Energy transferred / time or current squared x resistance
6
Q
Power supplied =
A
Current x potential difference
7
Q
Energy transferred from the mains =
A
power x time
8
Q
Output power =
A
Efficiency x its input power
