What is the unit of power defined as energy per unit time?

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Multiple Choice

What is the unit of power defined as energy per unit time?

Power is the rate at which energy is transferred or work is done. In the SI system, this rate is measured in watts, and one watt equals one joule of energy transferred per second. So, P = E/t, meaning if 60 joules of energy are used in one second, the power is 60 watts. In electrical contexts, power can also be written as P = VI, where V is voltage and I is current. Joule is a unit of energy, so it tells you how much energy is involved, not how fast it’s used. Volt is a unit of electric potential difference, not power. Ampere is a unit of electric current, the flow rate of charge, not energy per time.

Power is the rate at which energy is transferred or work is done. In the SI system, this rate is measured in watts, and one watt equals one joule of energy transferred per second. So, P = E/t, meaning if 60 joules of energy are used in one second, the power is 60 watts. In electrical contexts, power can also be written as P = VI, where V is voltage and I is current.

Joule is a unit of energy, so it tells you how much energy is involved, not how fast it’s used. Volt is a unit of electric potential difference, not power. Ampere is a unit of electric current, the flow rate of charge, not energy per time.

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