3.5 Transmission of Electricity

Subtopic 3.5 is the last topic in Electromagnet which covers the generation & transmission of electricity.This subtopichow transformer plays the role in our transmission network.

Here i list out theSPM checklist for this subtopic:

You must be able to do the following:

1. List the Sources of energy used to generate electricity.
e.g, nuclear power, hyro power, wind & etc

2. Then..Describe ways to generate electricity..
U need to describe details of the examples given in number 1.Descibe how the energy is transformed for each case. For example, describe how hydoelectric power can generate electricity. ..I mean u need to explain how water is used to rotate the turbine to drive the generators. (Its all in your books)

3. Describe the transmission of electricity?
This one is important. It has been asked in previous SPM paper. So make sure u understand the model of eletricty transmission system. In other words,please study about our national grid network.

Power Station--> Step up trnsformer-->Transmission cables(wires)-->SubStation-->

4. Describe the loss of electrical energy in the transmission cables
Please notice that there is loss of energy along the cables into heat. U can calculate power loss using this equation P=I^2R..please read further on this in yr reference book.

5. State the importance of National Grid Network?
U need to list the advantages of using this networksuch as increase in efficiency, easy to maintain and etc. U can easily find this facts in your book..all u need to do is take out your reference book & read it NOW! :)

6. Explain the importance of renewable energy?
Well..please read this as well..its just like doing your english essay :)
When petrol price gone up last year, everybody is making noise. So its your task to explain that its crucial for us to find sources of renewable energy.

Basically after u've gone though checklist..
the next important thing is to DO QUESTIONS!!