A-LevelPhysicsWork, energy and power9702/12 · Feb/Mar 2025 · Q171 Mark
A turbine at a hydroelectric power station is situated at a vertical distance of 30 m below the level of the surface of a large lake. The water passes through the turbine at a rate of 340 m³ per minute. The overall efficiency of the turbine and generator system is 90%. The density of water is 1000 kg m⁻³. What is the useful power output of the power station?
A0.15 MW
B1.5 MW
C1.7 MW
D90 MW
✓ Correct answer
B: 1.5 MW
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