Measuring resistance

This lesson focuses on identifying variables in the measuring resistance practical and how we can appropriately display our results. We will then describe and explain the effect of a length of wire on 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!

Q1.Select the correct unit for resistance

coulomb joule watt amp ohm volt

1/7

Q2.Select the correct circuit symbol for a resistor

Option 1

Option 2

Option 3

Option 4

2/7

Q3.Select the correct equation for ohm's law (where 'x' represents multiply and '/' represents divide)

potential difference = current / resistance potential difference = resistance / current potential difference = current x resistance current = potential difference x resistance resistance = potential difference x current

3/7

Q4.Convert 3 mA to A

3A 0.3 A 30 A 0.03 A 300 A 0.003 A 3000 A

4/7

Q5.Convert 2.4 kΩ into Ω

2.4 Ω 2400 Ω 24000 Ω 0.0024 Ω 0.024 Ω

5/7

Q6.A bulb has a current of 2 A and a resistance of 6 Ω. What is the potential difference? Remember potential difference = current x resistance

0.3 V 2V 3 V 6 V 12 V

6/7

Q7.A computer has a current of 0.75 A and a potential difference of 3.3 V. What is the resistance? Give your answer to 2 significant figures

0.23 Ω 0.44 Ω 2.4 Ω 2.5 Ω 4.4 Ω

7/7

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!

Q1.Select the correct unit for resistance

coulomb joule watt amp ohm volt

1/7

Q2.Select the correct circuit symbol for a resistor

Option 1

Option 2

Option 3

Option 4

2/7

Q3.Select the correct equation for ohm's law (where 'x' represents multiply and '/' represents divide)

3/7

Q4.Convert 3 mA to A

3A 0.3 A 30 A 0.03 A 300 A 0.003 A 3000 A

4/7

Q5.Convert 2.4 kΩ into Ω

2.4 Ω 2400 Ω 24000 Ω 0.0024 Ω 0.024 Ω

5/7

Q6.A bulb has a current of 2 A and a resistance of 6 Ω. What is the potential difference? Remember potential difference = current x resistance

0.3 V 2V 3 V 6 V 12 V

6/7

Q7.A computer has a current of 0.75 A and a potential difference of 3.3 V. What is the resistance? Give your answer to 2 significant figures

0.23 Ω 0.44 Ω 2.4 Ω 2.5 Ω 4.4 Ω

7/7

Video

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Worksheet

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PPTX

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:

Measuring Resistance

This will assess your understanding of the knowledge gained in this lesson so far and your prior knowledge.

Q1.Select the correct equation for ohm's law (where 'x' represents multiply and '/' represents divide).

potential difference = current / resistance current = potential difference x resistance potential difference = resistance / current resistance = potential difference x current potential difference = current x resistance

1/6

Q2.A bulb has a current of 3.2 A and a resistance of 4 Ω. What is the potential difference? Give your answer to 2 significant figures

0.80V 1.2V 1.25V 1.3V 12 V 12.8 V 13V

2/6

Q3.Select the factors that INCREASE resistance in a wire (Tick 3 boxes)

Select three (3) boxes

Shorter wire Longer wire Lower temperature Higher temperature Smaller cross section Bigger cross section

3/6

Q4.A student wants to measure how temperature affects resistance of a wire. Identify the independent variable.

Temperature of wire Resistance of wire Material of wire

4/6

Q5.A student wants to measure how temperature affects resistance of a wire. Identify the dependent variable.

Temperature of wire Resistance of wire Material of wire

5/6

Q6.A student wants to measure how temperature affects resistance of a wire. Identify the control variable.

Temperature of wire Resistance of wire Material of wire

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:

Measuring Resistance

This will assess your understanding of the knowledge gained in this lesson so far and your prior knowledge.

Q1.Select the correct equation for ohm's law (where 'x' represents multiply and '/' represents divide).

1/6

Q2.A bulb has a current of 3.2 A and a resistance of 4 Ω. What is the potential difference? Give your answer to 2 significant figures

0.80V 1.2V 1.25V 1.3V 12 V 12.8 V 13V

2/6

Q3.Select the factors that INCREASE resistance in a wire (Tick 3 boxes)

Select three (3) boxes

Shorter wire Longer wire Lower temperature Higher temperature Smaller cross section Bigger cross section

3/6

Q4.A student wants to measure how temperature affects resistance of a wire. Identify the independent variable.

Temperature of wire Resistance of wire Material of wire

4/6

Q5.A student wants to measure how temperature affects resistance of a wire. Identify the dependent variable.

Temperature of wire Resistance of wire Material of wire

5/6

Q6.A student wants to measure how temperature affects resistance of a wire. Identify the control variable.

Temperature of wire Resistance of wire Material of wire

6/6

Lesson summary: Measuring resistance

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Measuring resistance

Intro quiz - Recap from previous lesson

Intro quiz - Recap from previous lesson

Video

Worksheet

Measuring Resistance

Measuring Resistance

Lesson summary: Measuring resistance

It looks like you have not completed one of the quizzes.

Time to move!

The next lesson in: Electricity and magnetism is: Lewis Howard Latimer

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The next lesson in:
Electricity and magnetism
is:
Lewis Howard Latimer