An elementary book on electricity and magnetism and their applications . - half will help us tounderstand just whatis happening in the re-volving coil if we firstconsider what wouldhappen in a singleloop of wire which is rotated in a magnetic field (Fig. 87). Ifwe start with the plane of the loop vertical and turn the handlein a clockwise direction, the wire BC moves down during thefirst half turn, and thus, by Flemings rule, the induced to send the current from C to B. At the same time the. Fig Single loop of wire turning in a mag-netic field. ELECTROMAGNETIC INDUCTI
An elementary book on electricity and magnetism and their applications . - half will help us tounderstand just whatis happening in the re-volving coil if we firstconsider what wouldhappen in a singleloop of wire which is rotated in a magnetic field (Fig. 87). Ifwe start with the plane of the loop vertical and turn the handlein a clockwise direction, the wire BC moves down during thefirst half turn, and thus, by Flemings rule, the induced to send the current from C to B. At the same time the. Fig Single loop of wire turning in a mag-netic field. ELECTROMAGNETIC INDUCTION 143 wire AD is moving up, and the current tends to flow fromA to D. The result is that during the first half turn the cur-rent goes around the loop in the direction ADCB. During thesecond half turn the current is reversed and goes around in thedirection A BCD. To show that this really does happen in the loop, we can cutthe wire and connect the ends to slip rings x and y (Fig. 88). The brushes B and B, whichrest on the rings, are connectedto a galvanometer. In thisway it can be shown that there
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectmagnetism, bookyear19
