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Lect10 handout
1. Faraday’s Law Physics 102: Lecture 10 Changing Magnetic Fields create Electric Fields
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8. ACT: Change Area 1 v v 3 Which loop has the greatest induced EMF at the instant shown above? L W 2 v
9. Faraday: Change Area V t=0 0 =BLW t t =BL(W+vt) L W EMF Magnitude: = B A cos( ) Example What about the sign of the EMF? V W vt
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22. Magnetic Flux Examples A conducting loop is inside a solenoid (B= o nI). What happens to the flux through the loop when you… Increase area of solenoid? Increase area of loop? Increase current in solenoid? Rotate loop slightly? Nothing Increases B A cos( ) Increases Decreases Example
23. Magnetic Flux II Increase area of solenoid Increase area of loop Increase current in solenoid Increases Nothing Increases A solenoid (B= o nI) is inside a conducting loop. What happens to the flux through the loop when you… B A cos( ) Example
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Editor's Notes
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Demo 371: Helmholz coil and bar magnet
Demo 371: Helmholz coil and bar magnet
Demo 193: copper pipe and cow magnet. Current induced in pipe opposes movement of magnet.
Demo: Helmholtz coil and bar magnet
Demo 371: Helmholz coil and bar magnet
Demo: EM cannon; soleoid S-N N-S loop…they repel each other
Demo: EM cannon; soleoid S-N N-S loop…they repel each other
Demo: Helmholtz coil and bar magnet Demo: copper pipe and cow magnet
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