What term refers to the amount of energy expended?

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Study for the GFA Lighting and Electric Test. Enhance your skills with flashcards and multiple choice questions. Each question includes hints and explanations to get you ready for your exam!

Multiple Choice

What term refers to the amount of energy expended?

Explanation:
Energy describes the total amount of energy used or transferred. Wattage is the rate of energy use—how quickly energy is being expended—also called power. Voltage is the electrical potential difference that drives current, not the amount of energy used. So, the term for the amount of energy expended is energy. For example, a 60-watt bulb uses energy at 60 joules per second; if it runs for two hours, it consumes 60 W × 2 h = 120 Wh of energy (about 432,000 J).

Energy describes the total amount of energy used or transferred. Wattage is the rate of energy use—how quickly energy is being expended—also called power. Voltage is the electrical potential difference that drives current, not the amount of energy used. So, the term for the amount of energy expended is energy. For example, a 60-watt bulb uses energy at 60 joules per second; if it runs for two hours, it consumes 60 W × 2 h = 120 Wh of energy (about 432,000 J).

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