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  2. Electrical energy - Wikipedia

    en.wikipedia.org/wiki/Electrical_energy

    Electrical energy is the energy transferred as electric charges move between points with different electric potential, that is, as they move across a potential difference. ...

  3. Electricity - Wikipedia

    en.wikipedia.org/wiki/Electricity

    Electricity is the set of physical phenomena associated with the presence and motion of matter possessing an electric charge.Electricity is related to magnetism, both being part of the phenomenon of electromagnetism, as described by Maxwell's equations.

  4. Electric potential energy - Wikipedia

    en.wikipedia.org/wiki/Electric_potential_energy

    Electric potential energy is a potential energy (measured in joules) that results from conservative Coulomb forces and is associated with the configuration of a particular set of point charges within a defined system.

  5. Electric charge - Wikipedia

    en.wikipedia.org/wiki/Electric_charge

    Electric charge (symbol q, sometimes Q) is a physical property of matter that causes it to experience a force when placed in an electromagnetic field.Electric charge can be positive or negative.

  6. Wireless power transfer - Wikipedia

    en.wikipedia.org/wiki/Wireless_power_transfer

    Inductive charging pad for a smartphone as an example of near-field wireless transfer. When the phone is set on the pad, a coil in the pad creates a magnetic field [1] which induces a current in another coil, in the phone, charging its battery.

  7. Energy density - Wikipedia

    en.wikipedia.org/wiki/Energy_density

    When discussing the chemical energy contained, there are different types which can be quantified depending on the intended purpose. One is the theoretical total amount of thermodynamic work that can be derived from a system, at a given temperature and pressure imposed by the surroundings, called exergy.

  8. Battery energy storage system - Wikipedia

    en.wikipedia.org/wiki/Battery_energy_storage_system

    Tehachapi Energy Storage Project, Tehachapi, California. A battery energy storage system (BESS), battery storage power station, battery energy grid storage (BEGS) or battery grid storage is a type of energy storage technology that uses a group of batteries in the grid to store electrical energy.

  9. Nanogenerator - Wikipedia

    en.wikipedia.org/wiki/Nanogenerator

    A nanogenerator is a compact device that converts mechanical or thermal energy into electricity, serving to harvest energy for small, wireless autonomous devices. It uses ambient energy sources like solar, wind, thermal differentials, and kinetic energy.