| Formel | Förklaring |
| 1 J = 1 Ws = 1Nm | J (Joule)
Ws (wattsekund) Nm (Newtonmeter) |
 |
W energi [Ws] (wattsekund)
P effekt [W] (watt) t tid [s] (sekund) |
 |
W energi [Ws] (wattsekund)
Q laddning [C] (coulomb) U spänning [V] (volt) |
| Formel | Förklaring |
| 1 J = 1 Ws = 1Nm | J (Joule)
Ws (wattsekund) Nm (Newtonmeter) |
|
W energi [Ws] (wattsekund)
P effekt [W] (watt) t tid [s] (sekund) |
|
W energi [Ws] (wattsekund)
Q laddning [C] (coulomb) U spänning [V] (volt) |