Field of a current loop, B = [μ0I]/[2R]
at center.
B = [Nμ0I]/[2R]
becomes B = μ0nI.
A toroid, an “endless”
solenoid, has proven to be very useful in physics research.
Again, it is easily analyzed using Ampere's Law.
Simple non-calculus version of
the Biot-Savart law, and a simple example it can solve. Use the
equation for B at the center of a loop of current, as we
found above, and modify it for the specific current segments
involved in a specific problem.
