. Practical physics. re. Inwhat direction will the wire tend to move on account of the earthsmagnetic field? Dyxamos 353. A simple alternating-current dynamo. The simplestform of commercial dynamo consists of a coil of wire soarranged as to rotate continuously between the poles ofa powerful electromagnet(Fig. 307). In order to make the mag-netic field in which the con-ductor is moved as strong aspossible, the coil is woundupon an iron core C. Thisgreatly increases the totalnumber of lines of magneticforce which pass between Xand S, for instead of an airpath the core offers an ironpath, as show
. Practical physics. re. Inwhat direction will the wire tend to move on account of the earthsmagnetic field? Dyxamos 353. A simple alternating-current dynamo. The simplestform of commercial dynamo consists of a coil of wire soarranged as to rotate continuously between the poles ofa powerful electromagnet(Fig. 307). In order to make the mag-netic field in which the con-ductor is moved as strong aspossible, the coil is woundupon an iron core C. Thisgreatly increases the totalnumber of lines of magneticforce which pass between Xand S, for instead of an airpath the core offers an ironpath, as shown in Fig. 308. The rotating part, consistmg of the coil with its core, iscalled the armature. One end of the coil is attached to theinsulated metal ring i?, which is attached rigidly to the shaftof the armature and therefore rotates with it, while the otherend of the coil is attached to a second ring: B. The brushesh and b, which constitute the terminals of the external circuit,are always in contact with these Fig. 307. Drum-wound armature DYNAMOS 29T
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectphysics, bookyear1922
