Sources of Electricity Lessons

3Nt Chapter 5 Sources Of Electricity Part I

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Together, gas-fired, oil-fired and coal-fired power stations are known as ........................ .................. stations.

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In fossil-fuel power stations, the fuels are burnt to produce heat. This burning process will produce ................. ...................... .

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—Of the three types of fossil fuels, ...................... ............. is the cleanest as it produces the least amount of pollutants.

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Of the three types of fossil ........... produces the largest amount of pollutants.

Multiple Select

—Presently, the power stations in Singapore are either ............... or ................. .

• oil-fired

• gas-fired

• Nuclear power

• hydro power

Open Ended

State one advantage of nuclear power.

Open Ended

State one disadvantage of nuclear power.

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In both fossil-fuel power stations and nuclear power stations, the central piece of equipment is the generator. When the .......................... is turned, electricity will be produced.

Open Ended

State the energy conversion in the furnace of power station.

Open Ended

State the energy conversion in the boiler of power station.

Open Ended

State the energy conversion when steam is used to turn the turbine in power station.

Open Ended

State the energy conversion when the turbine then turn the generator to produce electricity.

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To reduce energy lost during transmission, electricity is ..................... ....... to a high voltage before transmission.

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At .................................. near offices and homes, voltage will be stepped down to around 230 V.

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Stepping up and down of voltages are done using ............................