Electrical power (Part 1)

In this lesson we will be learning about electrical power and how to calculate it using current, potential difference and resistance.

This quiz includes images that don't have any alt text - please contact your teacher who should be able to help you with an audio description.

Quiz:

Intro quiz - Recap from previous lesson

Before we start this lesson, let’s see what you can remember from this topic. Here’s a quick quiz!

Question 1

Question 2

Question 3

Question 4

Question 5

Question 6

Q1.What colour is the live wire?

1/6

Q2.What colour is the earth wire?

2/6

Q3.What material are the pins on a 3-pin plug made of?

3/6

Q4.Inside the plug, what is placed in series with the live wire?

4/6

Q5.What is the frequency of the mains supply in the UK?

5/6

Q6.What is an alternating current?

6/6

This quiz includes images that don't have any alt text - please contact your teacher who should be able to help you with an audio description.

Quiz:

Intro quiz - Recap from previous lesson

Before we start this lesson, let’s see what you can remember from this topic. Here’s a quick quiz!

Question 1

Question 2

Question 3

Question 4

Question 5

Question 6

Q1.What colour is the live wire?

1/6

Q2.What colour is the earth wire?

2/6

Q3.What material are the pins on a 3-pin plug made of?

3/6

Q4.Inside the plug, what is placed in series with the live wire?

4/6

Q5.What is the frequency of the mains supply in the UK?

5/6

Q6.What is an alternating current?

6/6

Video

Click on the play button to start the video. If your teacher asks you to pause the video and look at the worksheet you should:

  • Click "Close Video"
  • Click "Next" to view the activity

Your video will re-appear on the next page, and will stay paused in the right place.

Worksheet

These slides will take you through some tasks for the lesson. If you need to re-play the video, click the ‘Resume Video’ icon. If you are asked to add answers to the slides, first download or print out the worksheet. Once you have finished all the tasks, click ‘Next’ below.

This quiz includes images that don't have any alt text - please contact your teacher who should be able to help you with an audio description.

Quiz:

Electrical Power Part 1

This quiz will test your knowledge from this lesson and your prior learning.

Question 1

Question 2

Question 3

Question 4

Question 5

Q1.Revision: What colour is the neutral wire in a 3 pin plug?

1/5

Q2.What is the unit of power?

2/5

Q3.Which equation correctly describes the relationship between power, current and potential difference?

3/5

Q4.Calculate the current that flows through a 60 W lamp if the potential difference across it is 8 V

4/5

Q5.Calculate the power of a speaker if it has a current of 250mA and a resistance of 4 Ohms.

5/5

This quiz includes images that don't have any alt text - please contact your teacher who should be able to help you with an audio description.

Quiz:

Electrical Power Part 1

This quiz will test your knowledge from this lesson and your prior learning.

Question 1

Question 2

Question 3

Question 4

Question 5

Q1.Revision: What colour is the neutral wire in a 3 pin plug?

1/5

Q2.What is the unit of power?

2/5

Q3.Which equation correctly describes the relationship between power, current and potential difference?

3/5

Q4.Calculate the current that flows through a 60 W lamp if the potential difference across it is 8 V

4/5

Q5.Calculate the power of a speaker if it has a current of 250mA and a resistance of 4 Ohms.

5/5

Lesson summary: Electrical power (Part 1)

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