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KQEH (channel 54), branded on-air as KQED Plus, is a PBS member television station licensed to San Jose, California, United States, serving the San Francisco Bay Area. The station is owned by KQED Inc. , alongside fellow PBS station KQED (channel 9) and NPR member KQED-FM (88.5) in San Francisco .
KQED (channel 9) is a PBS member television station licensed to San Francisco, California, United States, serving the San Francisco Bay Area.The station is owned by KQED Inc., alongside fellow PBS station KQEH (channel 54) and NPR member KQED-FM (88.5).
The renovated venue hosts KQED Live, a series of lectures, concerts, discussions and other live events with entertainers, journalists, politicians, musicians, authors, chefs, and other guests. [2] Reopening events for the public were postponed due to the COVID-19 pandemic. [3] KQED is the bay area's most notable public broadcaster. [4]
An electropermanent magnet or EPM is a type of permanent magnet in which the external magnetic field can be switched on or off by a pulse of electric current in a wire winding around part of the magnet. The magnet consists of two sections, one of "hard" (high coercivity) magnetic material and one of "soft" (low coercivity) material. The ...
The first machines to produce electric current from magnetism used permanent magnets; the dynamo machine, which used an electromagnet to produce the magnetic field, was developed later. The machine built by Hippolyte Pixii in 1832 used a rotating permanent magnet to induce alternating voltage in two fixed coils.
The greater strength of neodymium magnets has inspired new applications in areas where magnets were not used before, such as magnetic jewelry clasps, keeping up foil insulation, children's magnetic building sets (and other neodymium magnet toys) and as part of the closing mechanism of modern sport parachute equipment. [34]
A permanent magnet motor is a type of electric motor that uses permanent magnets for the field excitation and a wound armature. The permanent magnets can either be stationary or rotating; interior or exterior to the armature for a radial flux machine or layered with the armature for an axial flux topology.
Neodymium magnets (an alloy, Nd 2 Fe 14 B) are the strongest permanent magnets known. A neodymium magnet of a few tens of grams can lift a thousand times its own weight, and can snap together with enough force to break bones. These magnets are cheaper, lighter, and stronger than samarium–cobalt magnets.