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