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Unformatted text preview: Magnetic field 8. What city did Thomas Edison strive to light up? New York 9. What scientist opposed Edisons method of current flow to deliver electricity? Tesla 10. Explain Lenzs Law? The flux created by the induced current always opposes the change in the external flux. 11. What is self induction? An electric current in any circuit creates a magnetic field which whenever it changes reduces a current in the same circuit that opposes its change. 12. How is it possible to make electric fields circulate? Changing the magnetic flux. 13. What does the demonstration involving the torroid illustrate? When a current is passed through those windings, the magnetic flux outside of a torroid is really equal to 0. There will be magnetic flux inside but no magnetic field outside....
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