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baileya
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Homework Statement
We have seen this week that there are 3 ways to generate an emf (voltage or a current) using Faraday's law. Suppose you have a permanent magnet (of your choice), and 5-cm radius coil of wire with 100 loops, and a sledge hammer. Describe the three different ways the loop of wire and the magnet can interact to produce an emf in the loop. Give specific details on what exactly you would do to produce the emf. Don't forget diagram(s)! For each way, estimate the potential difference you could create in the wire.
In the last part you will need to research reasonable numbers for the magnetic field produced by a permanent magnet. Don't forget to reference your sources.
Homework Equations
emf = -d"phi"/dt
phi = (magnetic field, B)(area, A)costheta
The Attempt at a Solution
Okay so I know that in order to induce emf you must change B or change A or change the angle. This also will introduce flux, "phi". I don't really understand how you would exactly change the magnetic field.. I just can't remember.
You can change the area by changing the overall shape of the coil so it's no longer circular, correct? (I seem to remember my prof saying this)
You can change the angle by moving the coil so that the difference between the coil's normal angle & the magnetic field(?) are changed, right?
Also, how would I find the potential difference?