# Multi-Step calculations

In this lesson we will be looking at how to approach multi-step calculation questions from the Electricity topic.

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 6

Q1.Revision: Which wire is the fuse connected in series with in a 3 pin plug?

1/6

Q2.Revision: Select the two sources that supply a direct current to a circuit.

Select two (2) boxes

2/6

Q3.Which of these is the definition of power?

3/6

Q4.Which of these equations is correct?

4/6

Q5.An electric toothbrush has a power rating of 15 W. If it is used for 2 minutes. How much energy is transferred?

5/6

Q6.How much charge flows through a lamp, if 20 J of energy is transferred and it has a p.d. of 5 V across it?

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!

## Question 6

Q1.Revision: Which wire is the fuse connected in series with in a 3 pin plug?

1/6

Q2.Revision: Select the two sources that supply a direct current to a circuit.

Select two (2) boxes

2/6

Q3.Which of these is the definition of power?

3/6

Q4.Which of these equations is correct?

4/6

Q5.An electric toothbrush has a power rating of 15 W. If it is used for 2 minutes. How much energy is transferred?

5/6

Q6.How much charge flows through a lamp, if 20 J of energy is transferred and it has a p.d. of 5 V across it?

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:

# Multi-Step Calculations

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

## Question 5

Q1.Revision: What is the unit of charge?

1/5

Q2.Revision: What piece of apparatus is used to vary the current in a circuit?

2/5

Q3.A potential difference of 10 V causes a current of 5 A to flow through a lamp. If the bulb is switched on for 20 seconds, how much energy is transferred?

3/5

Q4.A resistor has a resistance of 12 Ohms, if a current of 2 A flows through the resistor for 10 seconds, how much energy is transferred?

4/5

Q5.An LED has potential difference of 2 V across it. If it has a resistance of 40 Ohms, calculate the charge that flows in 10 seconds.

5/5

Quiz:

# Multi-Step Calculations

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

## Question 5

Q1.Revision: What is the unit of charge?

1/5

Q2.Revision: What piece of apparatus is used to vary the current in a circuit?

2/5

Q3.A potential difference of 10 V causes a current of 5 A to flow through a lamp. If the bulb is switched on for 20 seconds, how much energy is transferred?

3/5

Q4.A resistor has a resistance of 12 Ohms, if a current of 2 A flows through the resistor for 10 seconds, how much energy is transferred?

4/5

Q5.An LED has potential difference of 2 V across it. If it has a resistance of 40 Ohms, calculate the charge that flows in 10 seconds.

5/5

# Lesson summary: Multi-Step calculations

### Time to move!

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For 5 mins...

Move around:
Climb stairs

On the spot:
Dance

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