Lewis Howard Latimer

This lesson looks at the work of Lewis Howard Latimer and his invention of the carbon filament light bulb. We will also compare different light bulbs and write analytically

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

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:

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

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

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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:

Lewis Howard Latimer

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.Match the circuit symbol with the correct label

A

switch voltmeter resistor ammeter cell bulb battery

B

switch voltmeter resistor ammeter cell bulb battery

C

switch voltmeter resistor ammeter cell bulb battery

D

switch voltmeter resistor ammeter cell bulb battery

E

switch voltmeter resistor ammeter cell bulb battery

F

switch voltmeter resistor ammeter cell bulb battery

G

switch voltmeter resistor ammeter cell bulb battery

1/5

Q2.Select the correct statements about series and parallel circuits below (tick 4 boxes)

Select four (4) boxes

Current is the same everywhere in series Current is shared across componenets in series Current is the same on each branch in series Current splits at the juction in parallel Potential difference is the same everywhere in series Potential difference is shared across components in series Potential difference is the same on each branch in parallel Potential difference splits at the junction in parallel

2/5

Q3.What is Lewis Howard Latimer most famous for inventing?

Train toilets Paper filament bulbs Carbon filament bulbs

3/5

Q4.Why was Latimer's carbon filament bulb better than Edison's paper filament bulb?

Brighter Lasted longer It got hotter It reacted well with the gases in the bulb

4/5

Q5.Select the advantages of LED bulbs over filament bulbs (tick 2 boxes)

Select two (2) boxes

They are more efficient They are cheaper to buy They have a longer lifespan They are brighter

5/5

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:

Lewis Howard Latimer

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.Match the circuit symbol with the correct label

A

switch voltmeter resistor ammeter cell bulb battery

B

switch voltmeter resistor ammeter cell bulb battery

C

switch voltmeter resistor ammeter cell bulb battery

D

switch voltmeter resistor ammeter cell bulb battery

E

switch voltmeter resistor ammeter cell bulb battery

F

switch voltmeter resistor ammeter cell bulb battery

G

switch voltmeter resistor ammeter cell bulb battery

1/5

Q2.Select the correct statements about series and parallel circuits below (tick 4 boxes)

Select four (4) boxes

2/5

Q3.What is Lewis Howard Latimer most famous for inventing?

Train toilets Paper filament bulbs Carbon filament bulbs

3/5

Q4.Why was Latimer's carbon filament bulb better than Edison's paper filament bulb?

Brighter Lasted longer It got hotter It reacted well with the gases in the bulb

4/5

Q5.Select the advantages of LED bulbs over filament bulbs (tick 2 boxes)

Select two (2) boxes

They are more efficient They are cheaper to buy They have a longer lifespan They are brighter

5/5

Lesson summary: Lewis Howard Latimer

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