# Electrical resistance

In this lesson we will explore the concept of electrical resistance. We will also learn about factors that will affect the current in a series circuit and we will learn how to use the equation V=IR.

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!

Q1.What is the unit of measure of potential difference?

1/6

Q2.Which of these definitions best describes potential difference?

2/6

Q3.Which of these statements best describes the size of an electrical current?

3/6

Q4.Which of these descriptions best describes how to measure the potential difference across a resistor?

4/6

Q5.If a charge of 25 C flows through a lamp and delivers 12 J of energy. What is the potential difference across the lamp?

5/6

Q6.A 3 V cell is used to transfer 15 mJ of energy to a resistor. How much charge must flow through the resistor?

6/6

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!

Q1.What is the unit of measure of potential difference?

1/6

Q2.Which of these definitions best describes potential difference?

2/6

Q3.Which of these statements best describes the size of an electrical current?

3/6

Q4.Which of these descriptions best describes how to measure the potential difference across a resistor?

4/6

Q5.If a charge of 25 C flows through a lamp and delivers 12 J of energy. What is the potential difference across the lamp?

5/6

Q6.A 3 V cell is used to transfer 15 mJ of energy to a resistor. How much charge must flow through the resistor?

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.

Quiz:

# Resistance

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

Q1.Which of these is the symbol for the unit of measure of resistance?

1/7

Q2.Which of these is the correct equation linking potential difference, current and resistance?

2/7

Q3.Which of these is the definition for resistance?

3/7

Q4.What is the symbol for the unit of measure of charge?

4/7

Q5.If the resistance of a series circuit is increased and the cell voltage remains the same, what will happen to the current?

5/7

Q6.A lamp has a resistance of 12 Ω, if the current through the lamp is 2 A, what is the potential difference across the lamp?

6/7

Q7.The national grid has a potential difference of 0.4 MV applied across the transmission lines. If the resistance of the lines is 0.2 kΩ, calculate the current running through the national grid.

7/7

Quiz:

# Resistance

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

Q1.Which of these is the symbol for the unit of measure of resistance?

1/7

Q2.Which of these is the correct equation linking potential difference, current and resistance?

2/7

Q3.Which of these is the definition for resistance?

3/7

Q4.What is the symbol for the unit of measure of charge?

4/7

Q5.If the resistance of a series circuit is increased and the cell voltage remains the same, what will happen to the current?

5/7

Q6.A lamp has a resistance of 12 Ω, if the current through the lamp is 2 A, what is the potential difference across the lamp?

6/7

Q7.The national grid has a potential difference of 0.4 MV applied across the transmission lines. If the resistance of the lines is 0.2 kΩ, calculate the current running through the national grid.

7/7

# Lesson summary: Electrical resistance

## Time to move!

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

For 5 mins...

Move around:
Walk

On the spot:
Chair yoga