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The formula for the permeance ( P ) of the flux tube, considering unit depth in the flux plotting technique, is given by:
[
P = frac{Phi}{H}
]
where:
– ( P ) is the permeance,
– ( Phi ) is the magnetic flux passing through the tube, and
– ( H ) is the magnetic field intensity.
Permeance is often expressed in terms of henries per meter (H/m).
If you have more specific parameters or conditions related to the problem, please provide additional details for a more tailored answer.
Answer: c
Explanation: The permeability in the air, mean width of the flux tube and the mean length of flux tube is calculated first. On substitution the permeance of the flux tube is obtained.