How is the rate at which work is being done expressed?

The rate at which work is being done is expressed in Watts. A Watt is defined as one Joule per second, which quantifies how quickly work is performed or energy is transferred. In practical terms, if you are performing work or utilizing energy, the rate at which this occurs can be measured in Watts. For example, a light bulb rated at 60 Watts uses 60 Joules of energy every second, illustrating the direct relationship between work and time in the context of energy usage.

While Joules measure the amount of work done or energy transferred, they do not include the time factor, which is essential for determining the rate. Newton is a unit of force, and horsepower, although also a unit of power, is less commonly used in electrical contexts compared to Watts. Therefore, the Watt is the standard unit for expressing the rate of work in the field of electricity and energy calculations.