Electrical Appliances Flashcards

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What is power in terms of energy transfer?

Power is the rate at which energy is transferred by an appliance over a period of time.

What is the equation for power?

Power (W) = Energy (J) / Time (s)

How do you calculate the energy used by an appliance?

Energy (J) = Power (W) × Time (s)

Convert 1 kilowatt (kW) to watts (W).

1 kW = 1000 W

How much energy does an appliance with a power rating of 2000 W use in one minute?

It uses 120,000 J or 120 kJ.

How is energy usage typically measured by energy companies?

Energy usage is measured in kilowatt-hours (kWh), which is the use of 1000 watts per hour.

Revision Notes
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