Which of the following is the SI unit of energy?

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Multiple Choice

Which of the following is the SI unit of energy?

Energy is the amount of work done or heat transferred, and in the SI system the unit is the joule. A joule can be defined as one watt-second: if energy is used at a rate of one watt for one second, that amounts to one joule. Equivalently, energy can be seen as power times time. A watt is the unit of power—the rate at which energy is transferred. Ampere is the unit of electric current, and volt is the unit of electric potential difference that drives current. For practical context, energy consumption is often quoted in kilowatt-hours, where 1 kWh equals 3.6 million joules.

Energy is the amount of work done or heat transferred, and in the SI system the unit is the joule. A joule can be defined as one watt-second: if energy is used at a rate of one watt for one second, that amounts to one joule. Equivalently, energy can be seen as power times time. A watt is the unit of power—the rate at which energy is transferred. Ampere is the unit of electric current, and volt is the unit of electric potential difference that drives current. For practical context, energy consumption is often quoted in kilowatt-hours, where 1 kWh equals 3.6 million joules.

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