Which of the following defines a Watt?

A Watt is defined as the unit of power in the International System of Units (SI), and it specifically represents the rate at which electrical energy is consumed or produced. When you say that something uses a Watt, you're indicating how much energy is used in one second. Therefore, electric energy used per second accurately captures the concept of a Watt.

In practical terms, if an appliance or device consumes one Watt of power, it means it uses one Joule of electrical energy per second. This definition is crucial for understanding electrical consumption, whether in residential settings or in broader applications within electrical engineering and physics.

The other options relate to different concepts in electricity and do not capture the precise definition of a Watt. While the resistance of an electric current, electric current itself, and the flow of electricity are all important aspects of electrical systems, they do not directly define power in terms of energy usage over time, which is what a Watt encapsulates.