Welcome to the Quiz!
This quiz contains 13 questions from a mix of 1 subtopics.
How is electricity usage typically measured by utility companies?
kilowatt-hours
watts
volts
amps
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What formula relates the energy usage, power rating, and usage time of an electrical appliance?
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If a 1,500 W hair dryer is used for 10 minutes, how much energy does it use?
0.25 kWh
0.15 kWh
1.5 kWh
2.5 kWh
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What variables are used to calculate the cost of electricity usage?
energy used and power factor
energy used and price per kWh
energy used and current
energy used and voltage
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If a 120 W TV is used for 5 hours and electricity costs 20p per kWh, what is the cost to run the TV?
£0.20
£0.10
£0.24
£0.12
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Which of the following is NOT a way to reduce electricity usage?
buying energy efficient appliances
running appliances longer
lowering the thermostat temperature
using LED light bulbs
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Which type of energy rated appliance indicates higher efficiency?
A+++
C
D
G
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Which of the following best describes energy efficient light bulbs?
less efficient but longer-lasting than traditional bulbs
similar efficiency to traditional bulbs
less efficient than traditional bulbs
more efficient and longer-lasting than traditional bulbs
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Why is saving energy important? Select the two best answers.
cuts radioactive waste
reduces air pollution
decreases access to electricity
lowers electricity costs
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Explain two benefits of using energy efficient appliances and light bulbs.
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A refrigerator with a power rating of 250 W is used for 3 hours a day. Calculate the energy used by the refrigerator in one day. Give your answer to 2 significant figures in kWh.
0.75 kWh
7.5 kWh
2.5 kWh
0.25 kWh
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Calculate the cost of operating a 1,000 W microwave for 2 hours if the electricity costs 15p per kWh.
£0.15
£1.50
£3.00
£0.30
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Calculate the annual cost of using an electric oven that consumes 2 kWh per use, used 180 times a year, if electricity costs 12p per kWh.
£43.20
£4.32
£21.60
£432.00
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