Use the Following Figure to Answer the Next Problem $\pi$ $\times$

question 84

Multiple Choice

Use the following figure to answer the next problem:
-The tightly wound toroid shown consists of 100 turns of wire,each carrying a current I = 3 A.If a = 12 cm and b = 15 cm,the magnetic field at r = 10 cm,due to the current in this toroid,is (µ₀ = 4 $\pi$ $\times$ 10^-7 N/A²)

• A)400 µT
• B)500 µT
• C)600 µT
• D)zero
• E)impossible to calculate without additional information.

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