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!

Question 1

Question 2

Question 3

Question 4

Question 5

Question 6

Question 7

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!

Question 1

Question 2

Question 3

Question 4

Question 5

Question 6

Question 7

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

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Worksheet

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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.

Question 1

Question 2

Question 3

Question 4

Question 5

Question 6

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 Length of wire Material of wire Cross section 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 Length of wire Material of wire Cross section of wire

5/6

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

Temperature of wire Resistance of wire Length of wire Material of wire Cross section 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.

Question 1

Question 2

Question 3

Question 4

Question 5

Question 6

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 Length of wire Material of wire Cross section 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 Length of wire Material of wire Cross section of wire

5/6

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

Temperature of wire Resistance of wire Length of wire Material of wire Cross section of wire

6/6

Lesson summary: Measuring resistance

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