You have three metal bars, labeled 1-3. Each bar has two ends, A and B. You make the following observations about how the various ends interact: • 1A attracts 3A, • 2A repels 1A, and • 3B attracts 1B. What can be said about each bar? Are any of the bars definitely a magnet? Are any of the bars definitely a ferromagnet? Explain your reasoning.
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- A small rod magnet has a magnetic field at a distance from it as large as Hom B = 2nz3 Where z is the distance from the magnet on the axis connecting the north pole and south, m is the moment of magnetic dipole. Assuming electrons orbit protons like small rod magnets, determine the m magnetic dipole of an electron orbiting an atom.As shown in the figure, a long, hollow, conducting cylinder of inner radius a and outer radius b carries a current that is flowing out of the page. Suppose that a = 4.93 cm, b = 7.93 cm, and the current i = 103 mA, uniformly distributed over the cylinder wall (between a and b). Find the magnitude of the magnetic field at each of the following distances r from the center of the cylinder: a)r = 6.39 cm. b) r = 9.25 cm.i know the direction of the magnetic force on a proton is in the negative y direction and the direction of the magnetic force on an electron is in the positive y direction
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