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Inductive charging. The primary coil in the charger induces a current in the secondary coil in the device being charged. 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 ...
Batteryless radio. A batteryless radio is a radio receiver which does not require the use of a battery to provide it with electrical power. Originally this referred to units which could be used directly by AC mains supply (mains radio); it can also refer to units which do not require a power source at all, except for the power that they receive ...
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. Wireless power transfer ( WPT ), wireless power transmission, wireless energy transmission ( WET ), or electromagnetic power transfer is the transmission of electrical energy without wires ...
Crystal radios were the first widely used type of radio receiver, and the main type used during the wireless telegraphy era. Sold and homemade by the millions, the inexpensive and reliable crystal radio was a major driving force in the introduction of radio to the public, contributing to the development of radio as an entertainment medium with ...
Alice Mann for TIME. Wolf Hall, Hilary Mantel. The Crown ’s Ben Miles brings an air of gravitas to the 2020 audiobook edition of Hilary Mantel’s much-celebrated best-selling 2009 novel, Wolf ...
Station Radio A42 – British copy of the US AN/PRC-9. Station Radio B44 – Short-range duplex AM set for artillery and anti-aircraft batteries. Station Radio B45. Station Radio B47 – VHF transceiver, 38 to 56 MHz. Station Radio B48 – VHF transceiver, 26 to 38 MHz. Station Radio C12 – Interim HF AM/CW set designed by Pye.
The antennas contained in mobile phones, including smartphones, emit radiofrequency (RF) radiation ( non-ionizing "radio waves" such as microwaves ); the parts of the head or body nearest to the antenna can absorb this energy and convert it to heat. Since at least the 1990s, scientists have researched whether the now-ubiquitous radiation ...
The Marconi–RCA Wireless Receiving Station is a historic district at the junction of Old Comers Rd. and Orleans Rd. in Chatham, Massachusetts. It and its companion transmitter station at Marion were used for WCC, the busiest ship to shore radio station for most of the 20th century. The district includes eight red brick buildings constructed ...
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