According to Kirchhoff’s law states that the current entering a node is always equal to the current leaving a node.
From the above Diagram
Current Flowing towards the Point: I1, I2, I6
Current Flowing Away from the Point: I3, I4, I5
Hence I1 + I2 + I6 = I3 + I4+ I5
The permeance of the magnetic circuit is defined as the reciprocal of the reluctance.
Permeance = 1/Reluctance
It is defined as the property of the magnetic circuit due to which it allows the flow of the magnetic flux through it. Permeance is analogous to conductance in an electric circuit.