Ampere's Law for a Toroidal Solenoid
A toroidal solenoid has N turns, an inner radius a, and an outer radius b. A current I flows through the windings. Using Ampère’s law, what is the magnitude of the magnetic field at a radial distance r from the center, where a < r < b?
A
μ₀NI/(2πr²)
B
μ₀NI/(2πr)
C
μ₀NI/(2π)(b-a)
D
μ₀NI/(2π)(b+a)
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