Welcome to the Quiz!
This quiz contains 9 questions from a mix of 1 subtopics.
What is the unit of measurement for the total energy transferred by an electrical appliance?
watts (W)
kilowatt-hours (kWh)
kilowatts (kW)
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What does the power of an electrical appliance represent?
the total energy transferred
the cost of running the appliance
the rate at which the appliance transfers energy
the time the appliance is switched on
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Which formula is used to calculate the energy transferred by an appliance in Joules?
energy transferred (J) = power (kW) × time (h)
energy transferred (J) = power (W) ÷ time (s)
energy transferred (J) = power (kW) ÷ time (h)
energy transferred (J) = power (W) × time (s)
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A 1500 watt hairdryer is used for 5 minutes (300 seconds). How much energy is transferred?
4,500 J
45,000 J
45 J
450,000 J
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What do electricity meters record?
the cost of electricity per unit
the power of electrical appliances
the time appliances are switched on
the cumulative energy usage in kilowatt-hours (kWh)
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Which formula is used to calculate the cost of electricity?
cost = Energy transferred (kWh) + Price per kWh
cost = Energy transferred (kWh) - Price per kWh
cost = Energy transferred (kWh) × Price per kWh
cost = Energy transferred (kWh) ÷ Price per kWh
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If electricity costs 25p per kWh and a household uses 400 kWh in a month, what is the total cost?
£25
£10
£1000
£100
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The total energy transferred by an appliance depends on both the and the time the appliance is switched on for.
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Explain how you would calculate the cost of electricity for a household over a one-month period.
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