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Fast neutrons can easily be slowed down by

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Fast neutrons can easily be slowed down by
A. the use of lead shielding
B. passing them through water
C. elastic collision with heavy nuclei
D. applying a strong electric field
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Correct Answer - b
Fast neutron can be easily slowed down by passing them through water. This is because of comparable masses the energy passed by neutron to water molecule is high.
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