Toroids: a Toroidal Solenoid Has a Central Radius of 0

question 77

Multiple Choice

Toroids: A toroidal solenoid has a central radius of 0.50 m and a cross-sectional diameter of 10 cm. When a current passes through the coil of the solenoid, the magnetic field inside the solenoid at its CENTER has a magnitude of 2.0 μT. What is the largest value of the magnetic field inside the solenoid when this current is flowing? (μ₀ = 4π × 10^-7 T ∙ m/A)

• A) 3.5 µT
• B) 1.8 µT
• C) 2.2 µT
• D) 0.50 µT
• E) 2.8 µT

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