P outside P, hole inside For a torus – think doughnut or bagel –we consider N turns wrapped around the donut, carrying a current I (the wires are still tightly packed, even though it doesn't appear so in the picture!) Using the ideas of the field outside a solenoid, what should be the magnetic field at point Phole, in the hole, and point Poutside, outside the toroid? b. From symmetry, what should be the direction of the magnetic field at point Pinside, a. inside the toroid? Use Ampere's Law to find the magnetic field inside a toroid, as a function of r. C.

P outside P, hole inside For a torus – think doughnut or bagel –we consider N turns wrapped around the donut, carrying a current I (the wires are still tightly packed, even though it doesn't appear so in the picture!) Using the ideas of the field outside a solenoid, what should be the magnetic field at point Phole, in the hole, and point Poutside, outside the toroid? b. From symmetry, what should be the direction of the magnetic field at point Pinside, a. inside the toroid? Use Ampere's Law to find the magnetic field inside a toroid, as a function of r. C.