An Ideal Solenoid Is Wound with 470 Turns on a Wooden

question 110

Multiple Choice

An ideal solenoid is wound with 470 turns on a wooden form that is 4.0 cm in diameter and 50 cm long. The windings carry a current in the sense shown in the figure. The current produces a magnetic field of magnitude $4.1 \mathrm { mT } \text {, }$ at the center of the solenoid. What is the current I in the solenoid windings? (?₀ = 4? × 10^-7 T ? m/A)

• A)3.5 A
• B)3.0 A
• C)2.6 A
• D)4.3 A
• E)3.9 A

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