![]() ![]() Here’s a second key point to consider: the magnetic field of permanent magnets can be calculated by computing its equivalent surface current density. After the extra turns of wire are added, the magnetic field strength is equivalent to three times what was previously seen. ![]() We know that B has a magnitude of 2.3 times ten to the negative four teslas, so we simply need to change it into our equation for the magnetic field at the center of the coil. Use teslas in scientific notation to represent your answer, and place a one-dimensional symbol at the end. After the loops of wire have been added, determine the strength of the magnetic field at the center of the coil. Using multiple turns in a circular coil of wire, we can determine the magnetic field strength. The magnetic field strength of a coil can be calculated using the following equation: B = μ * N * I / (2 * pi * r) where: B is the magnetic field strength μ is the permeability of free space N is the number of turns in the coil I is the current through the coil r is the radius of the coil
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