Which among the following characters make graphite a good moderator?
A
Cross-sectional area of graphite is very high
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B
Graphite is a good conductor of electricity
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C
There is elastic collision between graphite and neutron
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D
Graphite has weak van der Waals' force between two layers
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Solution
The correct options are A Cross-sectional area of graphite is very high C There is elastic collision between graphite and neutron Graphite has a high surface area and performs elastic collisions to nuclei making it an excellent moderator.