Answer Happy

B. Refer to Figure 2. The relative permeability of the core material is 3000, and the dimensions are: x = 20 cm, y = 25 cm, d= 6 cm, a = b = 6 cm. There are 80 turns on the coil. 7. Determine the reluctance of the core. 8. Determine the inductance of the core. 9. Determine the flux density in the right-hand leg of the core if the current i in the coil is 0.75 A. 10. The terminals m and n are connected to a standard US electrical outlet (120 VRMS at 60 Hz). Determine the peak value of the flux density in the right-hand leg of the core. 11. Determine the number of turns that would be required to make the inductance 20x greater than that found in question 8. (Round to the nearest whole number) 12. 12. Using the number of turns from question 11, determine the length of a horizontal air-gap that would need to be cut into the center of the right-hand leg of the core to reduce the inductance to that of question 8. Assume the air-gap's effective cross- sectional area is increased by 10% due to fringing. Figure 2.) P Pr NTurns D X B