Starter quiz
What does the V on a cell or battery stand for?- value
- vents
- volts ✓
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- Which of the following statements is correct?
- Voltage is the measure of electrical push and volts are the units used. ✓
- Volts is the measure of electrical push and voltage is the units used.
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- What effect would removing cells from a circuit have on the voltage of the circuit?
- It would go up.
- It would stay the same.
- It would go down. ✓
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Which of the following statements is correct?- Larger cells have a higher voltage.
- Smaller cells have a higher voltage.
- The voltage cannot be predicted from the size of the cell. ✓
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What is the voltage of the cell shown? You do not need to include the unit in your answer.- '3 ' ✓
- Cells with a higher voltage provide a __________ electrical push to a circuit.
- slower
- stronger ✓
- faster
- weaker
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Exit quiz
Changing the voltage of cells and batteries can affect the ______ of a bulb in a circuit.- 'brightness' ✓
- Which of the following methods can be used to measure the brightness of a bulb?
- using your eyes
- using a light sensor and a data logger ✓
- using a light saber
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Which of the following is the unit used for measuring the brightness of a light?- lox
- lax
- lux ✓
- lex
- lix
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- If a lower voltage is used in a circuit containing a bulb, the bulb would be ...
- dimmer. ✓
- more colourful.
- brighter.
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Which of the following causes a bulb to 'blow' or burn out?- the voltage being too high ✓
- the voltage being too low
- there being too many switches
- there being too many wires
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Which of the following describes sharing results by saying them out loud?- a graph
- a written description
- a verbal description ✓
- a table of results
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Worksheet
Presentation
Video
Lesson Details
Key learning points
- Equipment such as a light sensor and data logger can be used to measure and record bulb brightness in lux.
- Changing the voltage of batteries can affect the brightness of a bulb in a simple circuit.
- A lower voltage leads to a dimmer bulb and a higher voltage leads to a brighter bulb.
- A higher voltage can cause the bulb to burn out or blow due to excess heat generated.
- The results of an investigation can be recorded in a table and presented using verbal and written forms.
Common misconception
The voltage of a cell is proportional to the size of the cell. Voltage is a tangible substance rather than a measure of electrical “push”.
Teaching slides and CfUs will clarify that voltage is a measure of the size of the push provided by a cell or other source of electricity and that cell size is not proportional to voltage.
Keywords
Voltage - Voltage is a measure of the size of the push provided by a cell or other source of electricity.
Brightness - The brightness of a bulb is the amount of light it gives out.
Affect - To affect something or someone is to change it or how it behaves.
Cell - A cell is a single unit that is needed for electricity to flow around a circuit.
Lux - Lux is the unit used to measure the brightness of a bulb or light.
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