New GCSE AQA Physics lesson on 'Alternating Current & Direct Current' written in line with new AQA Physics specification.
Simple starter using images for pupils to work out what the lesson is about today. Pupils must then group a bunch of electrical devices, either DC or AC supply or both.
The direction of flow of current is reviewed (although not entirely necessary but highlights some key physics).
This leads to descriptions of DC and AC current flow.
A class demo modelling a circuit using pupils as electric charge allows for a visual demonstration of AC and DC current. This can also allow for a teaching opportunity for frequency of AC current.
Key wave properties are reviewed to help with analysis of AC waveform representations.
Mains electricity at 230V and 50Hz is highlighted, being important to the specification. Peak potential difference is also discussed.
The lesson concludes with a collection of review questions and also a question to review AC and DC current looking at slo-mo capture of lights.
Lesson Objectives:
1) Identify AC and DC devices.
2) State and explain what is meant by direct current, DC.
3) State and explain what is meant by alternating current and relate to mains supply.
4) Determine period and frequency of an AC supply using diagrams.
Also includes lesson on National Grid.
Simple starter using images for pupils to work out what the lesson is about today. Pupils must then group a bunch of electrical devices, either DC or AC supply or both.
The direction of flow of current is reviewed (although not entirely necessary but highlights some key physics).
This leads to descriptions of DC and AC current flow.
A class demo modelling a circuit using pupils as electric charge allows for a visual demonstration of AC and DC current. This can also allow for a teaching opportunity for frequency of AC current.
Key wave properties are reviewed to help with analysis of AC waveform representations.
Mains electricity at 230V and 50Hz is highlighted, being important to the specification. Peak potential difference is also discussed.
The lesson concludes with a collection of review questions and also a question to review AC and DC current looking at slo-mo capture of lights.
Lesson Objectives:
1) Identify AC and DC devices.
2) State and explain what is meant by direct current, DC.
3) State and explain what is meant by alternating current and relate to mains supply.
4) Determine period and frequency of an AC supply using diagrams.
Also includes lesson on National Grid.
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