NEET Physics Nuclear Fusion MCQ Question
Which of the following statements about nuclear fusion is correct?
Nuclear fusion requires overcoming the coulomb barrier due to repulsion between positively charged nuclei.
The height of the coulomb barrier is constant and does not depend on the charges of the interacting nuclei.
Thermonuclear fusion can occur at any temperature without the need for energy input.
Controlled fusion reactors operate at temperatures below 10^8 K to facilitate fusion reactions.
Correct Answer
Detailed Explanation
Statement A is correct because nuclear fusion indeed requires enough energy to overcome the coulomb barrier caused by the repulsion between positively charged nuclei. Statement B is incorrect as the barrier height depends on the charges and radii of the nuclei. Statement C is false since fusion requires high temperatures to provide the necessary energy. Statement D is also incorrect because controlled fusion reactors aim for temperatures around 10^8 K.
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