An Ideal Solenoid with 400 Turns Has a Radius of 0.040

question 87

Multiple Choice

An ideal solenoid with 400 turns has a radius of 0.040 m and is 40 cm long.If this solenoid carries a current of 12 A,what is the magnitude of the magnetic field at the center of the solenoid? (μ₀ = 4π × 10^-7 T ∙ m/A)

• A)16 mT
• B)4.9 mT
• C)15 mT
• D)6.0 mT
• E)9.0 mT

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