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2. Sources of electrical energy - Wikipedia

   en.wikipedia.org/wiki/Sources_of_electrical_energy

   Friction is the least-used of the six methods of producing energy. If a cloth rubs against an object, the object will display an effect called friction electricity. The object becomes charged due to the rubbing process, and now possesses an static electrical charge, hence it is also called static electricity. There are two main types of ...

3. Electricity generation - Wikipedia

   en.wikipedia.org/wiki/Electricity_generation

   Electricity generation is the process of generating electric power from sources of primary energy.For utilities in the electric power industry, it is the stage prior to its delivery (transmission, distribution, etc.) to end users or its storage, using for example, the pumped-storage method.

4. List of energy resources - Wikipedia

   en.wikipedia.org/wiki/List_of_energy_resources

   Battery (electricity) Bioalcohol; Biodiesel; Biodiesel production; Biofuel; Biogas; Biomass; Bio-nano generator; Bitumen; Breeder reactor; Bubble fusion – a nuclear fusion reaction hypothesized to occur during sonoluminescence, an extreme form of acoustic cavitation. Coal; Coal mining; Cold fusion; Combustion; Compound turbine – two axle, steam

5. Lemon battery - Wikipedia

   en.wikipedia.org/wiki/Lemon_battery

   Note that incandescent light bulbs from flashlights are not used because the lemon battery is not designed to produce enough electric current to light them. Such a battery typically produces 0.001 A (1 mA) of current at a potential difference of 0.7 V; these values are multiplied together to determine the overall power of 0.0007 W (0.7 mW).

6. Earth battery - Wikipedia

   en.wikipedia.org/wiki/Earth_battery

   To obtain the natural electricity, experimenters would thrust two metal plates into the ground at a certain distance from each other in the direction of a magnetic meridian, or astronomical meridian. The stronger currents flow from south to north. This phenomenon possesses a considerable uniformity of current strength and voltage.

7. Gravity battery - Wikipedia

   en.wikipedia.org/wiki/Gravity_battery

   Pendulum clock driven by three weights as "gravity battery". An old and simple application is the pendulum clock driven by a weight, which at 1 kg and 1 m travel can store nearly 10 Newton-meter [Nm], Joule [J] or Watt-second [Ws], thus 1/3600 of a Watt-hour [Wh], while a typical Lithium-ion battery 18650 cell [2] can hold about 7 Wh, thus 2500 times more at 1/20 of the weight.

8. Electric power system - Wikipedia

   en.wikipedia.org/wiki/Electric_power_system

   A steam turbine used to provide electric power. An electric power system is a network of electrical components deployed to supply, transfer, and use electric power. An example of a power system is the electrical grid that provides power to homes and industries within an extended area.

9. Electrical energy - Wikipedia

   en.wikipedia.org/wiki/Electrical_energy

   For electrical utilities, it is the first step in the delivery of electricity to consumers. The other processes, electricity transmission, distribution, and electrical energy storage and recovery using pumped-storage methods are normally carried out by the electric power industry. [3]