Basic Electrical Theory MAGNETIC CIRCUITSMAGNETIC CIRCUITSWhat is a magnetic circuit? To better understand magnetic circuits, a basicunderstanding of the physical qualities of magnetic circuits will be necessary.EO 1.8 EXPLAIN the physical qualities of a simple magnetic circuit,including relationships of qualities and units of measurements.EO 1.9 Given the physical qualities of a simple magnetic circuit,CALCULATE the unknown values.EO 1.10 DESCRIBE the shape and components of a BH magnetizationcurve.EO 1.11 EXPLAIN the cause of hysteresis losses.EO 1.12 Given Faraday’s Law of induced voltage:a. DESCRIBE how varying parameters affect induced voltage.b. CALCULATE voltage induced in a conductor moving througha magnetic field.EO 1.13 STATE Lenz’s Law of induction.MagneticCircuitsA magnetic circuit can be compared with an electric current in which EMF, or voltage, producesa current flow. The ampere-turns (NI), or the magnetomotive force (F_{m} or mmf), will producea magnetic flux F (Figure 26). The mmf can be compared with EMF, and the flux (F) can becompared to current. Equation (1-16) is the mathematical representation of magnetomotive forcederived using Ohm’s Law, .IERF = (1-16)F_{m}RmmfRwhereF= magnetic flux, WbF_{m}= magnetomotive force (mmf), AtR = reluctance,AtWbRev. 0 Page 37 ES-01