AIIMS 2019 Physics Nuclear Reactions MCQ Question

The principle of a controlled chain reaction is utilized in an atomic energy reactor, where the fission of heavy nuclei, such as Uranium-235 (U-235), is carefully managed to produce a steady output of energy for electricity generation. In contrast, an atom bomb relies on an uncontrolled chain reaction, resulting in an explosive release of energy. The core of the sun primarily generates energy through nuclear fusion, where hydrogen nuclei combine to form helium, while artificial radioactivity involves the transformation of stable nuclei into radioactive ones, but does not involve chain reactions.