Question 6: The magnetic system shown in the following figure has the following parameters: N=500 i-2 A Width of air gap=2 cm Depth of air gap-2 cm Length of air gap=1 mm -C Neglect the reluctance of the core, the leakage flux, and the fringing flux. (a) Determine the force of attraction between both sides of the air gap. (b) Determine the energy stored in the air gap.
Ampere Circuital Law
Ampere's Law states that "for any closed loop path, the sum of the length elements times the magnetic field in the direction of the length element is equal to the permeability times the electric current enclosed in the loop.”
Current Density
To design the electrical and electronic system, the current density is an important factor. The designer current level is the factor on which the circuit performance depends and with the help of the dimensions of the conducting current the current density is then determined. For instance, despite the lower current demanded by smaller devices as integrated circuits are reduced in size, there is a type of trend in achieving the higher device number in even smaller chip areas. The current density is increased in this region at higher frequencies because the conducting region in a wire becomes confined and this is known as the skin effect. The consequences increase as the current densities become higher.
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