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Physics Questions and Answers

General Science
85. Control rods used in nuclear reactors are made of
 
  • A. stainless steel
  • B. graphite
  • C. cadmium
  • D. plutonium
 
86. Least distance of distinct vision is nearly equal to
 
  • A. 1 metre
  • B. 0.25 metre
  • C. 0.5 metre
  • D. 0.2 metre
 
87. The scientist who discovered the relation between electricity and magnetic effects
 
  • A. Ampere
  • B. Laplace
  • C. Ohm
  • D. Oersted
 
88. Beta particles are
 
  • A. neutrons
  • B. protons
  • C. electrons
  • D. thermal neutrons