A torpid consisting of 500 loops of wire carries a current of 3.25 Amp. The inner and outer radii of the torpid are 2.75 centimeter and 4.25 centimeter.
(a) Find the strength of the magnetic field at the inner radius of the torpid?
(b) Find the strength of the magnetic field at the outer radius of the torpid?
(c) Find the strength of the magnetic field at the center of the torpid loops?
(d) Find the strength of the magnetic field at twice the outer radius of the torpid?