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Summary (Cont.) An emf is induced by a wire moving with a velocity v at an angle q with a B-field. v sin q E= BLv sinq Induced Emf E In general for a coil of N turns of area A rotating with a frequency in a B-field, the generated emf is given by the following relationship: B q v For N turns, the EMF is: E NBAwsin q
Summary (Cont.) The ac generator is shown to the right. The dc generator and a dc motor are shown below: DC Generator V Electric Motor
Page 1 and 2: Electromagnetic Induction
Page 3 and 4: Induced Current When a conductor mo
Page 5 and 6: Magnetic Flux Density • Magnetic
Page 7 and 8: Example 1: A current loop has an ar
Page 9 and 10: Example 2: A coil has 200 turns of
Page 11 and 12: Example 3: Use Lenz’s law to dete
Page 13 and 14: Motional EMF in a Wire Force F on c
Page 15 and 16: The AC Generator • An alternating
Page 17 and 18: Calculating Induced EMF Rectangular
Page 19 and 20: Example 5: An ac generator has 12 t
Page 21 and 22: The Electric Motor In a simple elec
Page 23 and 24: Example 6: A series-wound dc motor
Page 25: Summary (Cont.) Lenz’s law: An in
Page 29: CONCLUSION: Chapter 31A Electromagn

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