| Quantity | Symbol | Unit | Definition | in Series | in Parallel | |||||
| Charge | Q | Coloumbs (C) | basic unit | - | - | |||||
| Current | I | Amperes (A) |
charge
time |
same | split | |||||
|
Voltage
potential difference, emf |
V | Volts (V) |
energy
charge |
split | same | |||||
| Resistance | R | Ohms (W) |
voltage current |
R = R1 + R 2 |
|
|||||
| Power | P | Watts (W) |
energy
time |
- | - | |||||
| Energy | E | Joules (J) | power x time | - | - |