Electromagnetic Induction

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Objectives: After completing thismodule, you should be able to:• Calculate the magnitude and direction ofthe induced current or emf in a conductormoving with respect to a given B-field.• Calculate the magnetic flux through anarea in a given B-field.• Apply Lenz’s s law and the right-hand hand ruleto determine directions of induced emf.• Describe the operation and use of ac anddc generators or motors.
Induced CurrentWhen a conductor movesacross flux lines, magneticforces on on the free electronsinduce an an electric current.Right-hand hand force rule showscurrent outward for down andinward for up up motion. (Verify)BDownUpIIDownUpvFFvBB
Page 1: Chapter 31A - ElectromagneticInduct
Page 5 and 6: Magnetic Flux Density• Magnetic f
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 s law to de
Page 13 and 14: Motional EMF in a WireForce F on ch
Page 15 and 16: The AC Generator• An alternating
Page 17 and 18: Calculating Induced EMFRectangularl
Page 19 and 20: Example 5: An ac generator has 12 t
Page 21 and 22: The Electric MotorIn In a simple el
Page 23 and 24: Example 6: A series-wound dc motor
Page 25 and 26: Summary (Cont.)Lenz’s s law: An A
Page 27 and 28: Summary (Cont.)The ac ac generator
Page 29: CONCLUSION: Chapter 31AElectromagne

Electromagnetic Induction

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