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We’re going to think about other possible sources for magnetic fields. Recall that the source of...

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Physics

We’re going to think about other possible sources for magneticfields. Recall that the source of magnetic fields in permanentmagnets is aligned electron orbits(electrons going in circles allthe same direction so the circles are parallel and they are eitherall traveling clockwise or counter clockwise).

  1. Where do electric fields come from? Draw an electric fielddiagram for each of the two types of source.
  2. Pick a spot in one of your field diagrams. How would youdetermine the electric field there (There’s an equation we usedthat is closely related to the force on a charge there)? Now, takethe same point, but move your source an inch to the right. What isthe electric field at that point now?
  3. Now, an electron orbit generates a magnetic field. What elsedoes it generate (this is directly related to the answer ofquestion 2)? Is that second thing static (constant) ortime-dependent (moving)?
  4. Now, why might a circuit generate a magnetic field (Think aboutquestions 2 and 3)? Why?
  5. If you wanted to make a wire generate a big magnetic field, howmight you design it and why (There are many ways to get to thisconclusion)? Congratulations, you have designed an inductor. Placethis object in a circuit and it will prevent changes incurrent.

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