Magnetic drug delivery is one option to target a drug onto a very localized part of the body. For example, if a blood clot, or thrombus, is detected inside a blood vessel, it should be removed in an effort to maintain normal blood flow through the vessel. Novel cancer therapies have also used magnetic drug delivery to treat tumors. Here, nanometer-sized particles (or nanoparticles) of iron oxide, a ferromagnetic material, are coated with functionalized drug components that can be precisely guided to specific areas of the body using magnetic fields. Once in position, the nanoparticles are exposed to a high frequency oscillating magnetic field that heats them, which releases the drug from their surface (see the figure). After injection into the bloodstream, a coil placed above the skin is used to guide the nanoparticles into position. If the 2.00-cm-diameter coil consists of 3750 turns of wire carrying a current of 5.00 A, what is the strength of the magnetic field at the center of the coil?