FLUX DENSITY INSIDE A LONG COIL
المؤلف:
S. Gibilisco
المصدر:
Physics Demystified
الجزء والصفحة:
360
10-10-2020
1499
FLUX DENSITY INSIDE A LONG COIL
Suppose that you have a long coil of wire, commonly known as a solenoid, with n turns and whose length in meters is s. Suppose that this coil carries a direct current of I amperes and has a core whose permeability is μ. The flux density B in teslas inside the core, assuming that it is not in a state of saturation, can be found using this formula:
B = 4π × 10-7 (μnI/s)
A good approximation is
B = 1.2566 × 10-6 (μnI/s)
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