Q3. A magnetic circuit made of silicon steel is arranged as in Fig. 3. The centre limb has a cross-sectional area of 800 mm2 and each of the side limbs has a cross sectional area of 500 mm2. Calculate the m.m.f. required to produce a flux of 1mWb in the centre limb, assuming the magnetic leakage to be negligible. ANS: 1015 A 250 1 mm 340 500 mm 340 mm 150 1.2 300 mm mm mm mm mm 250 %3D mm Figure 3 Figure 4

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Coulomb’s Law

Coulomb's law states that the attraction or repulsion force between two charged things is proportional to the product of their charges and inversely proportional to the square of their distance. It has an effect along the line that connects the two-point charges.