Mains Electricity 3

Multiple Choice

Which of the following is a significant reason for learning about mains electricity in daily life?

• To understand how to safely use electrical appliances

• To learn about the history of electricity

• To memorize the names of scientists

• To avoid using electricity completely

Open Ended

Why is understanding the cost of mains electricity important for households and communities?

Multiple Choice

Why is it a struggle for many households to balance their budgets when it comes to electricity expenses?

• Because electricity is costly and bills are high

• Because electricity is free and unlimited

• Because electricity is only used at night

• Because electricity is not needed

Multiple Choice

Which of the following statements about the cost of electricity infrastructure in South Africa is correct?

• The cost of power lines is approximately R1,5 million per kilometre.

• The cost of power lines is less than R100,000 per kilometre.

• No new power lines have been installed since 2008.

• Power lines are free to install.

Open Ended

Explain why infrastructure is necessary for providing electricity to homes and businesses.

Fill in the Blanks

The Kusile Power Station in Mpumalanga cost

billion rand to build.

Multiple Choice

Which of the following appliances typically have high wattages and use a lot of electricity?

• Heaters, geysers, and stoves

• Radios and energy-saving bulbs

• Solar panels and kettles

• Fans and LED lights

Open Ended

Describe one way to save energy at home based on the information provided in the images.

Multiple Choice

Which of the following is a way to save energy at home?

• Use energy-saving light bulbs

• Leave lights on all day

• Use regular incandescent bulbs

• Keep appliances plugged in when not in use

Open Ended

Why is it important to switch off appliances that are not in use?

Fill in the Blanks

The power output of an energy saving bulb is

W.

Multiple Choice

Which appliances from the tables have a power output greater than 1000 W?

• Electric kettle, Frying pan, Hair blow dryer, Electric iron

• CD player, Computer, Energy saving bulb, Cell phone charger

• Television set, Electric blanket, Automatic washing machine, CD player

• Radio, Computer, Hair blow dryer, Electric iron

Fill in the Blanks

The cost of electricity is an important topic because it affects

in our daily lives.

Open Ended

What is one question you still have about mains electricity or the cost of electricity after this lesson?