# What Unit of electrical power is equal to one joule?

There is no unit of power equal to one joule. This is because
joules are used to measure energy, *not* power.

One joule is one watt-second.

In a purely electrical environment, it might arise as one volt-ampere-second.

### What is the rate at which energy is transformed from one form to another?

That is called "power". The SI unit of energy is the joule, the SI unit for power is the watt, which is equal to joules/second. That is called "power". The SI unit of energy is the joule, the SI unit for power is the watt, which is equal to joules/second. That is called "power". The SI unit of energy is the joule, the SI unit for power is the watt, which is equal to joules/second…

### What are the differences between a joule and a watt?

Joules versus watts The joule and the watt are closely related units. The joule is a unit of work and energy. It is equal to a newton-meter (N-m). Note that the unit of torque is also the newton-meter, but scientists don't use the word joule when they are talking about torque. The watt is a unit of power and is defined as a joule per second, so you can see that power is work per…