Question

c Configuration A Configuration B Question 7 of 15 3 Points Scenario: Consider a magnetic circut with a mean tongth of 0.7m. A 1x10 tum collis wound around the left-hand imb. The magnetic circut is made from sticon steel core effects may not be ignored. The cross section is uniform and there is a 0.6 mm air gap in the circuit Find the current required in the coil to give a fux density of 140 Tin the air gap. The number of turns in the collis The magnetic field intensity in the core. His A-Um The current in the coil, is A keep two decimals)

Answer 1

Given data mean length=0.7m No. of Twi) = 100 wound around the left hand.limb = 0.6min. air gep= B = 1.407 het's consider A = 12cm 2 Prz 4000 S= Siron + Sair Simon e POMA 11605 04.7 AT/wb 0.7 40X10-7 x 400 x 12x10-4 0.6 x 10-3 unx10-7x400x 12x 10-1² Sair= 2 994.71 ATlub. MOA S = Spron + Sair = 1161499.5 ~ 11 6 500

0-MMF = Ni B=0/A -3 S i- Sx N $-BXA 116500 x 1168 X10 100 = 14X 12x10-4 1.68810-3 wb li=1.95 A b No. of turns the coil & 100 © Magnetic field intensity H. Ha Nia 100X1,95 l 0.7 H2.278.57 Act/m = 278.57 At/m @ Current in the coil li= 1.95 A → Sempiguration -B is preferred because e-Area of circulation is less than square, so the volume q the come reduces and core losses Meduces .

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