We're going to take lots of copper wire and wrap it into a coil. The bigger the coil is, the harder this project will be, so let's give it a radius of 10 cm, which is big enough to comfortably fit a frog but not unmanageable. Realistically, we're not going to be able to get more than 10,000 turns of the wire into one place, so let's take that to be our N. How much current will we need to pass through the wire to get the necessary magnetic field in the center of the coil