An Ideal Solenoid of Radius a Has N Turns Per

question 3

Multiple Choice

An ideal solenoid of radius a has n turns per unit length and current I. The magnetic flux Φ_B through any area completely inside the solenoid, centered on the solenoid axis but at a 45° angle to the axis, so that it touches the inside of the solenoid, as shown below, is

• A) .
• B) .
• C) μ₀πa²nI.
• D) 2μ₀πa²nI.
• E) 0.

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