An iron ring has a mean path length of 30 cm. Three exciting coils are
placed as shown in fig. The net flux in the circuit is 1.5 mwb. The ring
has a square cross section of 12 cm^2. Neglect leakage and fringing.
Assume that Flux density is 1.25 wb/m^2 and the mmf is 375 AT. Calculate the number of turns required to be placed in coil C. The number of turns of coil A and coil B are 200 and 600 respectively. The current in the coil is shown in the diagram.
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