APFIVE Magnetic Field of a Solenoid
A solenoid with n turns per unit length carries current I. Using the Biot-Savart law, which expression correctly gives the magnetic field magnitude inside the solenoid far from its ends?
A
B = μ₀nI
B
B = μ₀nI/(2π)
C
B = μ₀nI/(4π)
D
B = μ₀nI/2
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