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2. Wireless power transfer - Wikipedia

   en.wikipedia.org/wiki/Wireless_power_transfer

   Wireless power transfer ( WPT ), wireless power transmission, wireless energy transmission ( WET ), or electromagnetic power transfer is the transmission of electrical energy without wires as a physical link. In a wireless power transmission system, an electrically powered transmitter device generates a time-varying electromagnetic field that transmits power across space to a receiver device ...

3. Inductive charging - Wikipedia

   en.wikipedia.org/wiki/Inductive_charging

   Inductive charging (also known as wireless charging or cordless charging) is a type of wireless power transfer. It uses electromagnetic induction to provide electricity to portable devices. Inductive charging is also used in vehicles, power tools, electric toothbrushes, and medical devices. The portable equipment can be placed near a charging station or inductive pad without needing to be ...

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6. Resonant inductive coupling - Wikipedia

   en.wikipedia.org/wiki/Resonant_inductive_coupling

   Resonant inductive couplingor magnetic phase synchronous coupling[4][5]is a phenomenon with inductive couplingin which the coupling becomes stronger when the "secondary" (load-bearing) side of the loosely coupled coil resonates.[5] A resonant transformerof this type is often used in analog circuitry as a bandpass filter.

7. World Wireless System - Wikipedia

   en.wikipedia.org/wiki/World_Wireless_System

   The World Wireless System was a turn of the 20th century proposed telecommunications and electrical power delivery system designed by inventor Nikola Tesla based on his theories of using Earth and its atmosphere as electrical conductors. He claimed this system would allow for "the transmission of electric energy without wires" on a global scale ...