A Toroid Has a Square Cross Section with the Length

question 26

Multiple Choice

A toroid has a square cross section with the length of an edge equal to the radius of the inner surface.The ratio of the magnitude of the magnetic field at the inner surface to the magnitude of the field at the outer surface is:

• A)1/4
• B)1/2
• C)1
• D)2
• E)4

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