What term denotes the rate at which work is done?

Study for the MTA Electrical Test. Use our flashcards and multiple choice questions to prepare, each question includes hints and explanations. Achieve success on your exam!

Multiple Choice

What term denotes the rate at which work is done?

Explanation:
Power is the rate at which work is done or energy is transferred. It tells you how quickly energy is used or delivered. For example, doing 100 joules of work in 5 seconds means a power of 20 watts. In electrical terms, power equals voltage times current (P = V × I) for DC or resistive loads, with AC forms adjusting for phase angle (P = VI cos φ). The other terms don’t describe rate: overload refers to exceeding capacity, potential is stored energy due to position, and phase difference relates to timing between waveforms. The term that denotes the rate of doing work is power.

Power is the rate at which work is done or energy is transferred. It tells you how quickly energy is used or delivered. For example, doing 100 joules of work in 5 seconds means a power of 20 watts. In electrical terms, power equals voltage times current (P = V × I) for DC or resistive loads, with AC forms adjusting for phase angle (P = VI cos φ). The other terms don’t describe rate: overload refers to exceeding capacity, potential is stored energy due to position, and phase difference relates to timing between waveforms. The term that denotes the rate of doing work is power.

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