# 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.

Quiz:

# Intro quiz - Recap from previous lesson

Before we start this lesson, letâ€™s see what you can remember from this topic. Hereâ€™s a quick quiz!

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

Quiz:

# Intro quiz - Recap from previous lesson

Before we start this lesson, letâ€™s see what you can remember from this topic. Hereâ€™s a quick quiz!

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 â€˜Resume Videoâ€™ 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 â€˜Nextâ€™ below.

Quiz:

# Electrical Power Part 1

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

Q1.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

Quiz:

# Electrical Power Part 1

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

Q1.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)

## Time to move!

Did you know that exercise helps your concentration and ability to learn?

For 5 mins...

Move around:
Jog

On the spot:
Dance