Conservation of Electric Charge and the Process of Charging

Describe the behavior of a system using conservation of charge.

  • The net charge or charge distribution of a system can change in response to the presence of, or changes in, the net charge or charge distribution of other systems.
    • The net charge of a system can change due to friction or contact between systems.
    • Induced charge separation occurs when the electrostatic force between two systems alters the distribution of charges within the systems, resulting in the polarization of one or both systems.
    • Induced charge separation can occur in neutral systems.
  • Any change to a system’s net charge is due to a transfer of charge between the system and its surroundings.
    • The charging of a system typically involves the transfer of electrons to and from the system.
    • The net charge of a system will be constant unless there is a transfer of charge to or from the system.
  • Grounding involves electrically connecting a charged system to a much larger and approximately neutral system (e.g., Earth).

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