Physics Notes: ELECTRICITY Section 6. National Grid supply & transformers

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Electricity Part 6 Generating electricity 'National Grid' power supply - environmental issues and the theory, calculations and uses of transformers

Sub-index for this section on a National Grid power supply system and the use of transformers

6.1 Example of a National Grid system electricity supply

6.2 More on transmission of electricity, need for transformers in the National Grid system

6.3 Comparing advantages/disadvantages of overhead power lines versus underground cables

6.4 More detailed notes on the theory, structure and uses of transformers

6.5 More examples of the uses of transformers

6.6 Examples of transformer calculations and worked out answers

See also Part 1.1 for a summary of all electricity equations you may need.

Energy resources and comparison of methods of generating electricity

Energy resources & uses, general survey & trends, comparing sources of renewables, non-renewables

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Electricity and magnetism revision notes index

1. Usefulness of electricity, safety, energy transfer, cost & power calculations, P = IV = I2R, E = Pt, E=IVt

2. Electrical circuits and how to draw them, circuit symbols, parallel circuits, series circuits explained

3. Ohm's Law, experimental investigations of resistance, I-V graphs, calculations V = IR, Q = It, E = QV

4. Circuit devices and how are they used? (e.g. thermistor and LDR), relevant graphs

5. More on series and parallel circuits, circuit diagrams, measurements and calculations

6. The 'National Grid' power supply, environmental issues, use of transformers

7. Comparison of methods of generating electricity (= energy Part 6)

8. Static electricity and electric fields, uses and dangers of static electricity

9. Magnetism - magnetic materials - temporary (induced) and permanent magnets - uses

10. Electromagnetism, solenoid coils, uses of electromagnets

11. Motor effect of an electric current, electric motor, loudspeaker, Fleming's left-hand rule, F = BIL

12. Generator effect, applications e.g. generators generating electricity and microphone


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