The equipotential surfaces for two point charges are shown in the figure, with the value of potential marked on the line for each surface. (a) What is the potential difference, VG-VD, between points G and D? (b) What is the potential difference, VA - VG, between points A and G? +160V 100V +40V ov -40V -100V -160V

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An electrostatic force is a force caused by stationary electric charges /fields. The electrostatic force is caused by the transfer of electrons in conducting materials. Coulomb’s law determines the amount of force between two stationary, charged particles. The electric force is the force which acts between two stationary charges. It is also called Coulomb force.