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Work, Energy, and Power — Physics STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 SciencePhysicsWork, Energy, and Power1 Mark
MCQ
Fast neutrons can easily be slowed down by
  • A
    The sue of lad shield.
  • B
    Passing them through water.
  • C
    Elastic collision with heavy nuclei.
  • D
    Applying a strong electric field.
✓

Answer

  1. Passing them through water.

Explanation:

Water is rich in hydrogen (proton). On collision, velocities of neutron and proton are interchanged. Fast neutrons come to rest and protons move with velocity of neutrons.

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