Which energy source uses water stored behind a dam to drive turbines?

Which energy source uses water stored behind a dam to drive turbines?

• A. Nuclear power
• B. Solar PV
• C. Hydroelectric power
• D. Geothermal

Answer: (C)

Hydroelectric power converts the potential energy of water stored behind a dam into electricity. When the stored water is released, it flows downhill with enough energy (head) to turn turbine blades. The turbines are connected to a generator, and as they spin, electrical energy is produced. The dammed reservoir provides on-demand water release, allowing controlled and often rapid electricity production to match demand. This is different from other options: nuclear power uses heat from fission to boil water and create steam that drives turbines; solar photovoltaic systems convert sunlight directly into electricity; geothermal energy taps heat from beneath the Earth's surface to generate steam or hot water for turbines. The key feature here is using stored water at height behind a dam to drive turbines and generate electricity.

Hydroelectric power converts the potential energy of water stored behind a dam into electricity. When the stored water is released, it flows downhill with enough energy (head) to turn turbine blades. The turbines are connected to a generator, and as they spin, electrical energy is produced. The dammed reservoir provides on-demand water release, allowing controlled and often rapid electricity production to match demand.

This is different from other options: nuclear power uses heat from fission to boil water and create steam that drives turbines; solar photovoltaic systems convert sunlight directly into electricity; geothermal energy taps heat from beneath the Earth's surface to generate steam or hot water for turbines. The key feature here is using stored water at height behind a dam to drive turbines and generate electricity.