حل مسائل الدائرة المغناطيسية 1. A series magnetic circuit has an iron path of length 50 cm and an air-gap of length 1 mm. The cross- sectional area of the iron is 6 cm2 and the exciting coil has 400 turns. Determine the current required to produce a flux of 0.9 mWb in the circuit. The following points are taken from the magnetization characteristic: 2. An iron-ring of mean length 30 cm is made of three pieces of cast iron, each has the same length but their respective diameters are 4, 3 and 2.5 cm. An air-gap of length 0.5 mm is cut in the 2.5 cm piece. If a coil of 1,000 turns is wound air gap. B/H characteristic of cast-iron may be drawn from the following: on the ring, find the value of the current it has to carry to produce a flux density of 0.5 Wb/m2 in the 3. An iron ring of mean length 50cm has an air gap of 1mm and a winding of 200 turns if the permeaility of iron is 400 when a current of 1.25 A flows through the coil find flux density? 4.T...
