Work Energy And Power Question 23
Question: Assertion : Heavy water is used as moderator in nuclear reactor. Reason : Water cool down the fast neutron.
Options:
A) If both assertion and reason are true and the reason is the correct explanation of the assertion.
B) If both assertion and reason are true but reason is not the correct explanation of the assertion.
C) If assertion is true but reason is false.
D) If the assertion and reason both are false.
E) If assertion is false but reason is true.
Show Answer
Answer:
Correct Answer: C
Solution:
When two bodies of same mass undergo an elastic collision, their velocities get interchanged after collision.
Water and heavy water are hydrogenic materials containing protons having approximately the same mass as that of a neutron.
When fast moving neutrons collide with protons, the neutrons come to rest and protons move with the velocity of that of neutrons.
