2 Generation of an alternating EMF.pptx - Generation of an alternating EMF Generation of an alternating EMF DD is \u201cspindles\u201d AB is \u201cloop\u201d N and

2 Generation of an alternating EMF.pptx - Generation of an...

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Generation of an alternating EMF
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Generation of an alternating EMF DD is “spindles” AB is “loop” N and S are the “poles of magnet” C1 and C2 are “slip rings” E1 and E2 are “carbon brushes” R is a “resistor”
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Discription : Loop AB is carried by a spindle DD. Rotated at a constant speed in anticlockwise direction , in uniform magnetic field due to poles NS. End of loop containing slip rings C1 and C2 but insulated from DD. Slip rings contains E1 and E2, connected to external resistor.
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EMF in rotating coil Figure (a) A and B are rotating parallel to direction of magnetic flux. Resulting, no flux is being cut and no EMF is being generated.
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Figure (b). Sides of the coil are cutting the lines of flux . Resulting ,EMF induced in the sides of the coil. “ the coil sides are moving in opposite directions, EMF act in opposite direction, represented by dot and cross”
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` Figure (c) If they act in same direction around the coil , the EMF at brushes is twice that which induced in the coil.
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  • Summer '16
  • Jam Adam Scalin
  • Magnetic Field

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