Electrical machinery; a practical study course on installation, operation and maintenance (1921)
Annett, Fred Anzley · New York [etc.] McGraw-Hill book company · leaf 44
nd entering at the other,just as we did with the permanent and natural magnet. Inthe case of the coil, however, it is called a solenoid, but it hasall the properties of a permanent magnet. It will attractpieces of iron, and if suspended by a string so that the axisof the magnetic field is in a… … Fig. 33.—Field about an electromagnet. an electromagnet. Altliougli this device possesses the proper-ties of a permanent magnet, it will remain magnetized onlyas long as current is flowing in the coil, and is therefore atemporary magnet. A convenient rule for determining the polarity of…
Electric machinery
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
