Magnetic Field of a Solenoid
A current I flows through a long solenoid with n turns per unit length. Which expression represents the magnitude of the magnetic field inside the solenoid and far from its ends?
A
B = μ₀nI/(4π)
B
B = μ₀nI
C
B = μ₀nI/(2π)
D
B = μ₀nI/2
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