QUESTION (a) A ferromagnetic core with relative permeability of 2000 is shown in Figure 1. The dimensions are shown on t

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Question A A Ferromagnetic Core With Relative Permeability Of 2000 Is Shown In Figure 1 The Dimensions Are Shown On T 1 (98.75 KiB) Viewed 62 times

QUESTION (a) A ferromagnetic core with relative permeability of 2000 is shown in Figure 1. The dimensions are shown on the diagram, and the depth of the core is 7cm. The airgaps on the left and right sides of the core are 0.05 cm and 0.07 cm, respectively. Because of the fringing effects, the effective area of the air gaps is 5 percent larger than their physical size. There are 300 turns in the coil wrapped around the centre leg of the core and the current in the coil is 1.0 A (1) What is the flux in each of the left, centre and right legs of the core? (ii) What is the flux density in each air gap? om - 30 cm Famt 7 cm 30 cm +7 cm 7 cm 30 cm -0.05 cm 300 tums 0.07 cm + +- 7 cm Figure 1: Circuit for Question (a). (b) Given the network shown in Figure 2, determine the input voltage. Z line = 0.1 +0.3 n Vs 36 kW 0.82 pf lagging 48 kW 0.88 pf lagging 24020° V rms Figure 2. Circuit for Question (b)