Explain the concept of magnetic poles.
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Iron filings cling to a magnet, especially at two points where its magnetism seems to be concentrated. These two regions of a magnet where it picks up the filings most copiously are called its poles. Quantitative measurements show that in many respects the force between the poles of two magnets is similar to the Coulomb force between electric charges. In particular, they exhibit the same inverse square dependence on distance. Hence, analogous to an electric dipole, we hypothesize that there are positive (N) and negative (S) magnetic charges within a magnet. Also, they are assumed to act as the source of the magnetic field in exactly the same way that electric charges act as the source of electric field. Therefore, assuming that magnetic charges as such exist, we view a bar magnet as a magnetic dipole : two magnetic charges of opposite polarity at its two poles (N and S), a distance 21 apart.
A magnetic pole is not an experimental fact: there are no real poles. Every experimental effort to demonstrate the existence of magnetic charges has failed.
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HEY MATE
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