WAEC Physics 2020 Objective — Question 10
Question 10 of 50 from the West African Examinations Council (WAEC) Physics 2020 Objective paper, with the correct answer and a full explanation.
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The material used to slow down the neutrons in a nuclear reactor is
- A. boron
- B. copper
- C. graphiteCorrect
- D. uranium
Explanation
For a nuclear reactor: the graphite/graphite moderator controls neutron speed; boron rod - control neutron population; uranium - serves as fuel; coolant - reduces excessive heat produced; heat exchanger - converts the heat energy produced to other forms.
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