Calculate the intensity that must be applied to the coil of the magnetic circuit of the figure, to establish a flux of 10-3 Wb in the right column. The relative permeability is assumed to be constant at all points and to have a value of μr=400, and the section S=10 cm2 is the same throughout the structure, except in the left column, which is 20cm 2. The length l is equal to 10 cm. Also calculate the flux in the central arm
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.
Calculate the intensity that must be applied to the coil of the magnetic circuit of the figure, to establish a flux of 10-3 Wb in the right column. The relative permeability is assumed to be constant at all points and to have a value of μr=400, and the section S=10 cm2 is the same throughout the structure, except in the left column, which is 20cm 2. The length l is equal to 10 cm. Also calculate the flux in the central arm.
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