What is the unit of electrical power?

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Multiple Choice

What is the unit of electrical power?

Power in an electrical system is the rate at which energy is transferred or used. The unit for this rate is the watt. One watt equals one joule of energy transferred per second. In circuits, power is the product of voltage and current, so P = V × I. That means if you have 1 volt across a device drawing 1 ampere, it’s using 1 watt of power. Joule is a unit of energy, not rate, which is why it isn’t the correct unit for power. Ohm measures resistance, and volt measures electric potential difference. A practical example: a 60-watt light bulb consumes energy at 60 joules per second when operated at its rated voltage and current. Larger facilities use kilowatts or megawatts for higher power.

Power in an electrical system is the rate at which energy is transferred or used. The unit for this rate is the watt. One watt equals one joule of energy transferred per second. In circuits, power is the product of voltage and current, so P = V × I. That means if you have 1 volt across a device drawing 1 ampere, it’s using 1 watt of power.

Joule is a unit of energy, not rate, which is why it isn’t the correct unit for power. Ohm measures resistance, and volt measures electric potential difference. A practical example: a 60-watt light bulb consumes energy at 60 joules per second when operated at its rated voltage and current. Larger facilities use kilowatts or megawatts for higher power.

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