If a body is charged by rubbing it,its weight:

  • A
    always decreases slightly
  • B
    always increases slightly
  • C
    may increase slightly or may decrease slightly
  • D
    remains precisely the same

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For what type of charge distribution,electric field can be obtained by using Coulomb's law and superposition principle?

Two objects are rubbed against each other. The nature of the electric force between them when they are placed at some distance is:

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