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Magnetic field due to coil (induced emf)

1. Homework Statement
Suppose you wrap wire onto the core from a roll Nof cellophane tape to make a coil.
Describe how you can use a bar magnet to produce an induced voltage in the coil.
What is the order of magnitude of the emf you generate? State the quantities you
take as data and their values.


2. Homework Equations

Emf = -N (d"Phi"/dt)

3. The Attempt at a Solution

I know that in order to induce a current I can insert the magnet in the hole of the coil and move it in order to produce magnetic flux, so therefore I have current. I guess I just don't really understand what the next two parts of the question are saying. Thanks for the help!
 

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