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JEE PHYSICS MCQ: NUCLEI
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Medium
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Understanding
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Statement-I: In reactors, light nuclei called modertors are provided along with the fissionable nuclei for slowing down fast neutrons.
Statement-II: In an elastic collision with hydrogen the neutron almost comes to rest and proton carries away the energy.
Statement-II: In an elastic collision with hydrogen the neutron almost comes to rest and proton carries away the energy.
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Correct option: A
Statement-I and Statement-II are true
Option A (Statement-I and Statement-II are true) is correct because moderators slow down neutrons for efficient fission, and hydrogen is effective due to its similar mass to neutrons.
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