Electricity inside us

"The whole of science is nothing more than a refinement of everyday thinking," A. Einstein. However, along with the development of human society, both the weight and the role of different sciences have varied. In the seventeenth and eighteenth centuries mechanics was focused upon, including heavenly mechanics, but in the nineteenth century it is already difficult to establish whether it was physics (and mechanics) that played the leading part, or whether it was chemistry or biology.

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Electric motors provide the driving power for a large and still increasing part of our modern industrial economy. The range of sizes and types of motors is large and the number and diversity of applications continues to expand. The computer on which this book is typed, for example, has several electric motors inside, in the cooling fan and in the disk drives. There is even a little motor that is used to eject the removable disk from its drive. All around us there are electrical devices that move things around. Just about everything in one’s life that whine, whirrs or...

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