Water is held behind a dam in a hydroelectric power scheme.
State the main form of energy stored in the water behind the dam.
The water is released from the dam and falls a vertical height of 360 m360\text{ m}360 m at a rate of 500 kg/s500\text{ kg/s}500 kg/s.
Calculate the rate at which energy is transferred by the falling water. (Use g=10 m/s2g = 10\text{ m/s}^2g=10 m/s2)
The power scheme supplies a current of 220 A220\text{ A}220 A at a voltage of 6500 V6500\text{ V}6500 V. Calculate the efficiency of the power scheme.
Hydroelectric energy is a renewable form of energy.
State one disadvantage of hydroelectric power schemes.
State one other renewable source of 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.