# Aes Units Of Electricity Quiz

8 Questions | Total Attempts: 112  Settings  Quiz created for use of year 9 KS3 pupils at the Anglo European School. The quiz covers aspects of electrical power ratings and energy consumption.

• 1.
Most large pieces of electrical equipment in our homes use electricity from the mains supply.What is the voltage of the mains supply?
• A.

220V

• B.

230V

• C.

240V

• D.

250V

• E.

12V

• 2.
Some appliances use more energy than others. Electrical fires use 1000J of electrical energy every second where radios use 100J per second.What would use more energy; listening to the radio for 40 minutes or using an electrical fire for 15 minutes?
• A.

The radio would use more electrical energy

• B.

The electric fire would use more energy

• C.

Both items would use the same amount of energy

• 3.
If I run an electrical fire for 15 minutes it uses 900,000 joules of energy. How many minutes would I have to listen to a radio for the use this much energy?The radio uses 100 joules of electrical energy per second.
• A.

100 minutes

• B.

150 minutes

• C.

225 minutes

• D.

1000 minutes

• E.

1500 minutes

• 4.
The energy we use has to be paid for. The more energy we use the ___________ the electricity bill. We can save money by only using electrical equipment when we need it.
• 5.
We can find out how much energy differnet appliances use by looking at their power rating. The power of an appliance is the number of joules of energy it uses each second.What are the units of power?
• A.

Ohms

• B.

Hertz (HZ)

• C.

Watts (W)

• D.

Centimeters (CM)

• 6.
______ watt(s)= 1 joule used every second
• 7.
A toaster has a power rating of 1100W. It takes 1 minute (60 seconds) to make taost in it. How many joules of energy are required to make a slice of toast?
• A.

660

• B.

6500

• C.

66000

• D.

650000

• 8.
When appliances have a high power rating the power is often given in Kilowatts (kW). If a kettle has a power rating of 2250 Watts how would it be expressed as Kilowatts?
• A.

0.225 kW

• B.

2.25 kW

• C.

22.5 kW

• D.

225 kW

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