An island nation decides to transition its electricity grid away from coal-fired power stations to renewable energy sources.
State two environmental problems caused by burning coal, other than contributing to global warming.
The nation decides to build a tidal barrage power station across an estuary. Describe how a tidal barrage generates electrical power.
Tidal barrages are expensive to construct. State two other disadvantages of using a tidal barrage power station to generate electrical power.
Because tidal energy generation is cyclic, the nation needs to store excess electrical energy during periods of high generation. Suggest one large-scale method of storing this electrical energy.
533 exam-style questions on CIE IGCSE Physics 1.7 Energy, work and power, covering 1.7.1a Energy stores and energy transfers, 1.7.1b Conservation of energy, 1.7.1c Kinetic and gravitational potential energy, 1.7.2 Work done, 1.7.3 Energy resources, 1.7.3a Energy resources and electricity generation, 1.7.3b Nuclear fusion as an energy source, 1.7.3c Efficiency of energy transfer, and 1.7.4 Power. Each one has a worked solution and a mark scheme showing where the marks go.