physics questions
DIRECTIONS : Questions based on Physics.
6. Which of the following is used as a moderator in nuclear reactor?
  A.  Ordinary water
  B.  Radium
  C.  Thorium
  D.  Graphite
7. In an atomic nucleus, neutrons and protons are held together by
  A.  Gravitational forces
  B.  Magnetic forces
  C.  Exchange forces
  D.  Coulombic forces

8. Television signal cannot be received generally beyond a particular distance due to
  A.  Curvature of the earth
  B.  Weakness of antenna
  C.  Weakness of signal
  D.  absorption of signal in air
9. Which one of the following is the unit of activity of a radioactive source?
  A.  Lux
  B.  Becquerel
  C.  Tesla
  D.  Siemens
10. Which one of the following is a good conductor of electricity?
  A.  Shellac
  B.  Ebonite
  C.  Glass
  D.  Human body
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