Which of the following is NOT TRUE?  a.   The force expressed by Coulomb’s law is mutual force, for each of the two charges experiences a force of the same magnitude, although of opposite direction.  b.   According to the Coulomb’s, the force experience by the two charges are inversely proportional to the square of the distance between the two charges.  c.   The value of permittivity of free space is equal to 8.854 x 10^-14 F/m  d.   The force on a charge in the presence of several other charges is the sum of the forces on that charge due to each of the other charges acting alone.

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Electric Charges and Fields

One of the fundamental properties is the electromagnetic property. Charge cannot be destroyed by any process and this contributes formally to the law of charge conservation.