Difference between element and compound type semiconductor
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Compound semiconductors are semiconductors that are made from two or more elements. Silicon is made from a single element, and therefore is not a compound semiconductor. ... It is also possible to use different elements from within the same group (IV), to make compound semiconductors such as SiC.
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Ferrite permanent magnets with flux concentrating pole pieces are preferred to rare earth types because of their lower cost. The primary brake for the wind turbine can be electrical since the permanent magnet excitation is available in the absence of an external supply.
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