How is power defined in the context of physics?

In the context of physics, power is defined as the rate at which work is done or energy is transferred over time. This relationship is mathematically expressed as work divided by time. When considering a scenario where work is accomplished, power quantifies how quickly that work is performed.

For instance, if a certain amount of work is done in a shorter duration, the power is higher compared to the same work done over a longer time period. This definition highlights the importance of both the amount of work completed and the timeframe in which it occurs, making option B the correct choice regarding the definition of power in physics.

In contrast, the other options do not accurately represent the concept of power. Force times distance describes work, not power. Energy times velocity involves different physical quantities that do not relate directly to power. Mass times acceleration represents force, which is also not related to the definition of power.