Electricity - Current, Voltage and Power Flashcards
1
Q
charge (Q)
A
coulombs (C)
2
Q
Current (I)
A
amperes (A)
3
Q
current definition
A
the rate of flow of charge (electrons in a solid, electrons and positive ions in an electrolyte)
I = ΔQ/Δt
4
Q
Potential difference (v)
A
volts (v)
5
Q
potential difference definition
A
the work done per unit charge transferred between two points in a circuit
V=W/Q
6
Q
Power (P)
A
watts (W)
7
Q
power definition
A
the rate at which work is done
P = VQ/Δt = IV = I^2R = V^2/R
