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Electromagnetic Induction & Alternating Current Resources: Grob: Basic Electronics Textbook: Chapters 15&16 Grob: Basic Electronics Textbook: Chapters.

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Presentation on theme: "Electromagnetic Induction & Alternating Current Resources: Grob: Basic Electronics Textbook: Chapters 15&16 Grob: Basic Electronics Textbook: Chapters."— Presentation transcript:

1 Electromagnetic Induction & Alternating Current Resources: Grob: Basic Electronics Textbook: Chapters 15&16 Grob: Basic Electronics Textbook: Chapters 15&

2 Michael Faraday While Orsted discovered a relationship between magnetism and electricity, Faraday discovered the principle of electromagnetism: that electricity can be created using magnetism. While Orsted discovered a relationship between magnetism and electricity, Faraday discovered the principle of electromagnetism: that electricity can be created using magnetism. Faraday presenting to the Royal Society

3 Faradays Experiments ndex.html ndex.html ndex.html ndex.html Show two of Faradays experiments Show two of Faradays experiments

4 Left-Hand: 3 Finger Rule The direction that induced current flows depends upon the direction the flux lines cut across the conductor The direction that induced current flows depends upon the direction the flux lines cut across the conductor This direction can be determined by using the 3-finger rule. This direction can be determined by using the 3-finger rule. Pointing finger points from Pointing finger points from N to S pole. N to S pole. Thumb points in the direction Thumb points in the direction in which the conductor moves. Middle finger indicates Middle finger indicates the direction of electron flow.

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6 Alternating Current ndex.html ndex.html

7 How it works!

8 Alternating Current cont.

9 AC vs DC (war of currents) Alternating Current Nikola Tesla (Westinghouse) Nikola Tesla (Westinghouse) Can be generated easily Can be generated easily Can be sent long distances with little loss in power Can be sent long distances with little loss in power Does not require batteries Does not require batteries Can be changed into DC easily when needed Can be changed into DC easily when needed Few generating stations Few generating stations Direct Current Thomas Edison Can be generated easily Difficult to send long distances Most devices need DC Sometimes requires the need for batteries Many generating substations (less than mile)

10 Sine Wave

11 Volts/Div= ______________Sec / Div = ______________ Period (Time) = __________Frequency= ____________ Peak V = ________P-P Voltage = _________RMS V= _________


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