Electrical Engineering: Principles & Applications (7th Edition)

Chapter 14

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The direction of the magnetic field B will be into... more

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in negative z-direction. ; The magnitude of the ... more

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; The expression to calculate the force acting on... more

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; Magnetic flux density of current carrying long ... more

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For Path 1 For Path 2 For Path 3 ; According to ... more

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 It is a repulsive force .  ; The force between ... more

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; Given that : Length of core: Length of air gap... more

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; Given that, Core stacking fator =0.9, Cross ... more

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; To calculate mutual inductance we need to ... more

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both flux will oppose each other.dot should be at ... more

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; It is given that Area of Hysteresis loop is , ... more

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; It is given that :cross section Area of core ... more

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and    ; is the impedance seen by the source, ... more

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, , and ; Value of resistance , that is ... more

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; According to the maximum power transfer theorem... more

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When electrons are in constant motion, that moving... more

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Faraday's law: When the fiux linkages with ... more

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Ampere's law states that line integral of magnetic... more

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The voltage is negative as bar magnet approaches ... more

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At from the straight wire the required magnetic ... more

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No, there is no net force acting on the loop.Due ... more

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; Force, generated on the wire is given as... more

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Magnetic field will be zero inside the pipe but ... more

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The relative permeability of the material is 1592.... more

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At force is attractive      there is no force... more

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Flux,Flux linkage,  ; Flux density Number of turns... more

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Using the right hand rule, we can determine the ... more

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; Lenz law states that, The induced emf with ... more

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The units of B isThe units of H isThe units of is... more

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; Using the right-hand rule, we find that the ... more

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  ; The sinusoidal voltage e is given as with : ; ... more

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Maximum value of flux linkage turnsMaximum value ... more

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; Flux is given by: ; However induced voltage e ... more

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; Voltage induced across the terminals of the ... more

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; Given and  , , the reluctance can be ... more

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; Given , and we know that and With these ... more

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The length is directly proportional to the ... more

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One of the advantage of the magnetic circuit is, ... more

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kilogram per second webinarcoulombs per second ... more

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; From the given values the magnetic flux can be ... more

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; The reluctance of the core can be calculated ... more

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; We know that , since R is negligible then flux ... more

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; By including the effect of fringing(i.e.,) ... more

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; From  the  given values the reluctance of the ... more

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; There are two coils is given. Since there are ... more

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; Two coils are wounded around the core which has... more

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; Given , , , When then the current since the ... more

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; Given , , , From the frequency the wavelength ... more

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; Given , , from this the value can be ... more

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Voltage  and current changes with change in ... more

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; Mutual inductance between the two coil is   ; ... more

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; Voltage across the coils can be determine by ... more

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; It is given reluctance Number of turns ... more

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in case 1in case 2 ; if both current enters the ... more

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 Dot should be placed on bottom  terminal of right... more

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; It is given that the material of both side coil... more

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  ; Given that initially wire is wounded on ... more

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; Given that  turns     ;   ; Assume a sinusoidal... more

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The two causes for core loss are Core losseddie ... more

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; Hysteresis loss, in transformer is ... more

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The B-H curve of a magnetic material is drawn ... more

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 Less area of B-H curve are desirable for material... more

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; The B-H curve area is used to obtain energy ... more

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; Given values are as follows:At Core loss, Power... more

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, ; Given values are as follows:The relation ... more

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Resistance of the coils is zero.Core loss is zero... more

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The better approach will be using a transformer as... more

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As power loss is directly proportional to ... more

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; Given that: Load resistance, Load resistance ... more

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; We can calculate secondary voltage and currents... more

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; Given that:  and , from these given values: ; ... more

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; The resistances and account for the ... more

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The Percent regulation %Efficiency % ; To find ... more

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Both and the resistor  are responsible for the ... more

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; From the given values can be determined.To find... more

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; From the given values can be determined.To find... more

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The assumptions of an ideal transformer  do not ... more

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; the source voltage is given by substituting ... more

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  ; To find the Power efficiency,Start with ... more

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The transformer is designed for a single frequency... more

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; Given that . The value of can be calculated ... more

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; To find the voltage induced , the relation can... more

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Mechanisms : Core Loss / hysteresis loss Eddy ... more

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Transformer B , because it consist of most of the ... more

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