Embedded Files
Introduction
Introduction
We all use electricity in our everyday lives. In this unit we look at why the mains supply uses alternating current and how we can use the electricity formulas to work out which fuse we need and how much energy will be transferred.
Specification links
Set 1 - Sections 4.2.3, &4.2.4
Set 2&3 - Sections 6.2.3 and 6.2.4
Task 1: Know
Task 1: Know
Task 1a: Use look cover write check and quizlet to learn the keywords and ideas for this topic.
Learn
Learn
Task 2: Alternating current and transformers
Task 2: Alternating current and transformers
Task 2b: Make notes that include
Describe the differences between direct and alternating current.
Give the frequency and potential difference of the UK mains supply
Set 1&2: Describe rectification
Describe the national grid.
Explain why the National Grid uses very high potential differences.
Describe the role of transformers in the National Grid
Set 1&2: Give the transformer equation
Set 1&2: Complete the calculations on slides 31 and 33, and check your answers using slides 32 and 34.
Task 2c: Complete and self mark the exam questions
Task 3: Cables and plugs
Task 3: Cables and plugs
Safety note: Do not attempt to wire a plug unless:
You are completely certain it is isolated from the mains power supply
You are supervised by a 'competent adult'
Task 3b: Make notes that:
Explain the function of each part of a plug
Identify and explain the materials used in cables and plugs in terms of their physical and electrical properties
Describe why a short circuit inside a device presents a hazard
Task 3c: Copy and complete the table below
Task 3d: Complete and self mark the exam questions
Task 4: Power and potential difference
Task 4: Power and potential difference
Task 4c: Complete and self mark the exam questions
Task 4d: Complete the progress check quiz
Task 5: Current and energy transfer
Task 5: Current and energy transfer
Task 5b: Make notes that:
Give the equation linking energy transferred, charge and time.
Describe the energy changes taking place in circuit components and explain how they occur
Explain how to calculate the energy changes taking place in electric circuits
Task 5c: Complete and self mark the exam questions
Task 6: Appliances and efficiency
Task 6: Appliances and efficiency
Task 6c: Complete and mark the exam questions
Task 7: Summary
Task 7: Summary
Task 7b: Complete the Seneca learning for this topic:
Task 7c: Make and mind map or other revision summary for this topic and add it to you revision folder. Use the specification to help you:
Specification links
Set 1 - Sections 4.2.3, &4.2.4
Set 2&3 - Sections 6.2.3 and 6.2.4
Task 8: Check
Task 8: Check
Complete the quiz to make sure you understand this topic
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