Edexcel IGCSE Physics 4 18p Electricity Generation Transfers Questions

Trace how these resources transfer energy through turbines, generators or solar cells, and explain how pumped hydro stores wind-generated energy.

Exam points

Identify the furnace and boiler as the stage transferring energy from a chemical store to a thermal store, and the generator as the stage transferring energy electrically from a kinetic store.
Trace hydroelectric generation from the water’s decreasing gravitational potential energy store through kinetic energy and mechanical transfers at the turbine and generator to electrical output; recognise heat and sound transferred to the surroundings.
Use a table of power-generation methods to identify which energy store decreases for each method shown.
Explain how wind-generated electricity can pump water from the lower lake to the upper lake when demand is low, storing gravitational potential energy for hydroelectric generation when demand is high.

[Maximum number: 3]

(a)

The diagram shows a fossil fuel power station.
Five stages of electricity generation and transmission are shown.

[ 3 ]

(i)

The power station burns a fossil fuel in the furnace.

Give an example of a fossil fuel.

[ 1 ]

(ii)

Which stage of the power station transfers energy from a chemical store to a thermal store?

condenser

furnace and boiler

generator

turbines

[ 1 ]

(iii)

Which stage of the power station transfers energy electrically from a kinetic energy store?

condenser

furnace and boiler

generator

turbines

[ 1 ]

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