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- Given a magnetic circuit with a current 2.6A flowing through 205 turns of wire on a core having a reluctance of 125000 At/Wb. Determine the magnetomotive force of the circuit in base units.explain why Two coils are said to be mutually coupled if the magnetic flux Ø emanating from one pass through the other. The mutual inductance between the two coils is given by M=ksquare root of L1xL2a. Find the current I required to establish a fluxφ = 2.4 × 10−4 Wb in the magnetic circuit ofFigure. Here area (throughout) =2 × 10−4 m2, lab = lef = 0.05 m, laf = lbe= 0.02 m, lbc = ldc, and the material is sheet steel. b. Compare the mmf drop across the air gap to thatacross the rest of the magnetic circuit. Discuss yourresults, using the value of μ for each material.
- The magmatic flux density within a har of some material of 0.630 Tesla at an H field of 5*10 compute the following for this material a-the magnetic permeability and the magnetic susceptibilityA bar of iron is said to be saturated once most of its magnetic molecules are aligned, whereby, increases in magnetomotive force results in smaller and smaller increases in flux in the core. a) true b) false A bar of iron is said to be saturated when it is magnetized to its practical maximum state. a) true b) true The magnetism which remains in a core once the external magnetomotive force has been removed is called a) saturation b) residual c) permeability d) none of the aboveWhat is a magnetic field? a) it is the space araund a magnet, or the space in whic magnetic forces act, b) it is the magnetic force which has definite direction at all points along a curved line from the north to south pole, c) it is the ability of a magnetic material to be magnetized easily, d) none of above Wihch of the following true with regards to magnetic materials. A) like polarities repel, B) unlike polarities attract, C) both a and b, D) none According to weber is theory of magnetism, a magnetic material_____. A) consust of one large single magnetic molecule, B) is made up from many tiny magnetic molecules, C) consist of one single nonmagnetic molecule, D) none
- An ideal core (assume relative permability is infinity) with a crossectional area of 12 cm2is excited via 10A current flowing through coil with 200 turns. On the one side of the coil, a 1 cm long paramagnetic material (µr=1) is placed. Calculate the magnetic field on paramagnetic materialA solenoid similar to the figure below, has a core made of caststeel (refer to the figure on the next slide). It has a cross-sectional area of 4cm2 and a mean length of 20cm. The coil has 100turns, and the coil current is 3.2A. Find the following:a)magnetomotive force, mmfb)magnetic field intensity, Hc)flux density, B (with graph)The surface area of the area covered by the conductive wire, which consists of a single loop in the form of a square with a side length of 22 cm, is parallel to the magnetic field. If a current of 6.3 A is flowing through this wire and the torque is 0.325 N.m, what is the strength of the magnetic field, in Tesla?
- Two coils that are separated by a distance equal to their radius and that carry equal currents such that their axial fields add are called Helmholtz coils. People in science and industry use coils like this to make regions where the net magnetic fields are relatively uniform (but not perfectly uniform). Let R=0.12 cm, I=22 A, and N=320 turns for each coil. Place one coil in the y-z plane with its center at the origin and the other in a parallel plane at R=0.12 cm. Calculate the resultant field Bx at x1=0.03 cm, x2=0.06 cm, x3=0.08 cm, and x4=0.12 cm. For my answers I got B1 = .00416 T, B2 = .00353 T, B3 = .00306 T, and B4 = .00221 T all of which were wrong. Can you please help me?A ferromagnetic material has a remanence of 1.5 T and a coercivity of 50,000 A/m.Saturation is achieved at a magnetic field intensity of 200,000 A/m, at which the fluxdensity is 2.5 T. Using these data, sketch the entire hysteresis curve in the rangeH= −200,000 to +200,000 A/m1. A coil of inductance 0.2 H and 1 ohm resistance is connected to a 90V source. What is the current when it is growing at a rate of 100 A/s? 2. If a permanent magnet has a uniform flux of 14,000 lines between the pole faces, what must its area be to have a flux density of 7,000 gauss, in square inch?