What is the main source of energy in a nuclear power plant?

• A. Chemical energy from fuel rods.
• B. The energy from fossil fuels.
• C. The heat generated from nuclear fission.
• D. Electric energy from turbines.

Answer: (C)

The energy comes from the heat released when atomic nuclei split in the reactor fuel. In a nuclear plant, fissile atoms like uranium-235 undergo fission, releasing a large amount of energy as heat. That heat is used to boil water and create steam, which then drives turbines connected to generators to produce electricity. So the actual energy source is the heat from nuclear fission, not chemical reactions or fossil fuels. The other options describe outcomes or alternatives (chemical energy from burning, energy from fossil fuels, or the final electric energy) rather than the process that releases the energy inside the reactor.