A unit of energy is the:

The unit of energy is indeed the joule. Energy is defined as the capacity to do work, and the joule is the standard unit of measurement for energy in the International System of Units (SI). One joule is equivalent to the energy transferred when one newton of force is applied over a distance of one meter or when one watt of power is used for one second.

In the context of electrical energy, the joule is often used to quantify the amount of energy consumed or produced by electrical devices. For instance, when you calculate the energy consumption of an appliance, the value is typically expressed in joules, demonstrating how well this unit encapsulates energy definitions across different domains.

The other terms mentioned pertain to different physical quantities. The watt is a unit of power, which measures the rate of energy transfer over time. The volt measures electric potential or voltage, indicating the force that drives electric current in a circuit. The ohm is the unit of resistance, quantifying how much a material resists the flow of electric current. Each has its specific application, but when discussing energy itself, the joule is the appropriate unit.