Electricity Equations Flashcards
1
Q
power (energy) =
P =
A
energy transferred ÷ time
E ÷ t
2
Q
power (work) =
P =
A
work done ÷ time
W ÷ t
3
Q
Efficiency (energy)=
A
Useful output energy/total input energy
4
Q
Efficiency (power)=
A
Useful power output/total power input
5
Q
charge flow =
Q =
A
current × time
I x t
6
Q
potential difference =
V =
A
current × resistance
I x R
7
Q
power (current)=
P =
A
current × potential difference
I x V
8
Q
energy transferred (charge flow)=
E =
A
potential difference × charge flow
V x Q
9
Q
energy transferred =
E =
A
potential difference × current × time
V x I x T
10
Q
work done =
W =
A
potential difference × charge flow
V x Q
