1.7.3. Energy resources
A subsection of Physics, 0625, through 1. Motion, forces and energy
Listing 10 of 215 questions
shows a wave-powered generator. It generates electricity from the movement of sea waves. chamber air incoming waves waves make water rise and fall turbine and generator The sentences below describe how the wave-powered generator works. A Air is pushed through the turbine, making it spin. B Water rises and falls in the chamber. C The turbine turns a generator. D The generator produces electrical energy. E Waves travel towards the chamber. Write letters in the boxes below to arrange the sentences in the correct order. The first one is done for you. E More electricity needs to be generated from renewable sources instead of from burning fossil fuels. State three benefits of generating electricity from renewable sources rather than from fossil fuels.
0625_m16_qp_32
THEORY
2016
Paper 3, Variant 2
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The source of solar energy is the Sun. Tick the box next to those resources for which the Sun is also the source of energy. coal geothermal hydroelectric nuclear wind shows a solar water-heating panel on the roof of a house. copper tubes, painted black roof Cold water flows into the copper tubes, which are heated by solar radiation. Hot water flows out of the tubes and is stored in a tank. Explain why the tubes are made of copper and are painted black. In 5.0 s, 0.019 kg of water flows through the tubes. The temperature of the water increases from 20 °C to 72 °C. The specific heat capacity of water is 4200 J / (kg °C). Calculate the thermal energy gained by the water in 5.0 s. thermal energy = The efficiency of the solar panel is 70%. Calculate the power of the solar radiation incident on the panel. power =
0625_m16_qp_42
THEORY
2016
Paper 4, Variant 2
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Nuclear power stations produce a useful form of energy. shows part of a nuclear reactor. cold water from turbines pump steam to drive turbines control rod fuel rod concrete casing State the name of the process that releases energy in the nuclear reactor. Suggest a suitable radioactive material used for the fuel rods. Below are four statements that describe the operation of a nuclear power station. They are not in the correct order. J The generator produces electricity. K The energy is used to boil water. L The nuclei split, releasing energy. M The steam drives a turbine. Place the statements in the correct order. The nuclear reactor is contained in a very thick concrete casing. Suggest why. Suggest one advantage and one disadvantage of a nuclear power station compared with a wind turbine. advantage disadvantage Wind turbines use a renewable source of energy. State the name of another renewable source of energy.
0625_m17_qp_32
THEORY
2017
Paper 3, Variant 2
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represents a hydroelectric system for generating electrical energy. power station pipe water reservoir Describe how the power station uses the water in the reservoir to generate electrical energy. State three advantages of generating electrical energy using a hydroelectric system compared with using a coal-fired power station. 1. 2. 3. An electric drill is shown in . It uses electrical energy. Complete the sentences about the electric drill. Use words from the box. Each word may be used once, more than once, or not at all. efficient kinetic potential powerful reliable thermal The electric drill usefully transforms electrical energy into energy. A second electric drill transforms the same amount of electrical energy per second as the first one. It wastes more of this energy. The second drill is less than the first drill.
0625_m18_qp_32
THEORY
2018
Paper 3, Variant 2
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Questions Discovered
215