The reluctance is -proportional to flux
Q: 22/ According to Lenz’s law negative sign indicates that induced EMF opposes the change in flux…
A: According to Lenz’s law negative sign indicates that induced EMF opposes the change in flux linkages…
Q: 13. The main function of interpoles is to minimize and the commutator when the d.c. machine is…
A: " Since you have asked multiple questions, we will solve the first question for you. If you want an…
Q: The "Ohm's law" for the magnetic circuit states that the net magnetomotive force (mmf) equals the…
A: For the magnetic circuit, the equation of the Ohm’s law is given as:
Q: The speed of a dc motor is directly proportional to the flux inversely proportional to applied…
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Q: Q3-(A)- Indicate whether the following statements are true or false and correct the false statements…
A: Given A true or false question based on Dc motors. Please find the below attachment for clear…
Q: Given: N=1000 I=1A μ = 1000 a = 1200 Hb The magnetic core is made up of iron with square. The total…
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Q: 34A certain laminated steel core has a permeability of 3000. The lenght is 0.0729 m and…
A: Note: We are authorized to answer the single question at a time, since the exact one wasn’t…
Q: is the value of magnetic flux produced by the meter, when the input current is off.
A: (1)
Q: There is 0.25A of current through a coil with 500 turns . What is the reluctance of the circuit if…
A: To solve the above magnetic circuit problem, one should have idea about magnetic circuit and its…
Q: What is the flux produced when a 2.5 A current flows through 500 turns coil wound in nonmagnetic…
A: We are authorized to answer one question at a time, since you have not mentioned which question you…
Q: in an electric circuits. Reluctance in a magnetic circuits corresponds to O Resistance Current O…
A: Reluctance: Reluctance is the property of magnetic circuit which opposes the flow of magnetic flux…
Q: An iron circuit with a small 0.75 mm air gap is shown in Figure 1. A 6000 turn coil carries a…
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Q: The generator convert from PV to PQ if the active power of the generator exceed the * maxinum and…
A: The generator convert from PV to PQ if the active power of the generator exceed the a) maximum and…
Q: The magnetic structure in the figure below is made of silicon steel. Determine the values of IB…
A: Note: Relative permeability (μr) for silicon steel is not given . We assume μr = 2000 Given: NB=…
Q: 25. In parallel AC circuits , all operations must be done under the rules of ____ mathematical…
A: Given: Parallel AC circuit In a parallel AC circuit voltage is uniform through the parallel…
Q: In Wave winding of DC Machine the number of brush sets is equal to
A: In dc machine , depending upon the requirement machine is connected in lap or wave . depending on…
Q: The core of an electro-magnetic structure is Laminated in order to: reduce the Stacking Factor…
A: Core of the transformer:- The core is constructed of numerous thin strips of grain-oriented silicon…
Q: Q3/ A/ Compare between de series and shunt generator. Q3/ B/ Briefly explain the commutating process…
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Q: The resistance of the shunt winding of a d.c. machine is measured before and after a run of several…
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Q: Mechanical losses represent: A. Windage losses B. None of the other choices are correct O C. Losses…
A: In this answer let us try to understand what are mechanical losses as explained below.
Q: Just draw the magnetic circuit of the core shown in the following figure 10 om Reluctance can be…
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Q: (1) What is the armature current IA for EA= (A-10)V (2) What is new value of EAnew, at C/5 percent…
A: RA=0.25Ω ;VT=A=436 V ;EA1=A-10=426V ;1 IA1=? for EA=A-10 C=7, ∴C/5=7/5=1.4% decrease ∴ϕ2=0.986ϕ1 2…
Q: The positive sequence current is Times the current in neutral wire
A: A balanced three-phase system with the same phase sequence as the original sequence is called as the…
Q: In a certain cast-steel core series magnetic circuit with a 400 turns, 170 At/m, mean length of 0.16…
A: Given, Number of turns, N= 400 turns Magnetic Field intensity, H= 170 AT/m Mean length, L= 0.16 m…
Q: 47. Flux linkage is equal to: a. Product of number of turns and magnetic flux b. Number of…
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Q: Which screwdriver required to turn the screw shown in figure? A. Flat head B. Hexagon C. Torx D.…
A: Philips screwdriver are used to handle screws having x shape at its tip.
Q: The reluctance of a non-magnetic path is 12 AT-Wb. Find the flux needed to be set up if surrounded…
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Q: 1. Explain electric are discharge V-A characteristic in DC and AC modes.
A: The DC and AC Forms of Arc welding are to basically used to for welding applications which require…
Q: An iron circuit with a small 0.75 mm air gap is shown in Figure 1. A 6000 turn coil carries a…
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Q: In a 4 pole lap wound DC Machine has 720 conductors, the number of parallel paths is on Windows bui…
A: - There are two types of winding configuration in DC Machine namely; Lap wound and wave wound. Given…
Q: In a closed loop, the direction of the current is independent whether the flux is increasing or…
A: According to Faraday's and Lenz's law Negative sign indicates the induced emf in the loop creates a…
Q: A lap wound DC machine has 400 conductors and 8 poles. The voltage induced per conductor is 2V. The…
A: Given: Lap wound DC machine has 400 conductors and 8 poles. So, Z=400P=8A=P=8 Voltage induced per…
Q: Q4. Explain what happens to voltage and current in each of the following cases: 1- Number of turns…
A: Effect of voltage and current in each case, 1) When number of turns in secondary winding is higher,…
Q: Find the pull exerted on the plunger of an electromagnet when the total flux is 300 uWb. The…
A: According to question we have to Find the pull exerted on the plunger of an electromagnet
Q: 1. Lap winding is suitable for Voltage, current d.c. generators. ....... ......
A: We’ll answer the first question since the exact one wasn’t specified. Please submit a new question…
Q: A 4-pole, D C machine has 144 slots in the armature with two coil-si slot, each coil has two turns.…
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Q: Inter pole winding is connected in
A: Interpole :- These are tapered poles used in dc machines. Interpoles are used to reduce the armeture…
Q: A certain laminated core has a permeability of 2,500. The length is 5.5 cm and the cross section is…
A: In this question we will find reluctance of certain laminated core with given permeability ,length…
Q: How many turns are on a coil if a current of 3.8A produces a magnetic flux of 2.7mWb in a magnetic…
A: Given, Current = 3.8 A Flux= 2.7mWb Reluctance = 1.4 MAT/Wb
Q: I= 1 A Find the total flux Show as the equivalent magnetic cct Permeability is 1500 Find the total…
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Q: _______________ is the value of magnetic flux produced by the meter, when the input current is off.
A: magnetic flux = B.A.cosθ when input current is off then value of B become zero so the value of…
Q: A magnetic circuit has 150 turns-coil, the cross- sectional area 5 x 10-4 m² and the length of the…
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Q: The core of an electro-magnetic structure is Laminated in order to: reduce the Stacking Factor…
A: Answer is option C Reduce the eddy current loss of the core
Q: he resistance of the shunt winding of a d.c machine is measured before and after a run of several…
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Q: 4. Two current-carrying loops are arranged so that one of the loops just sits above the other just…
A: Explanation: The current in each loop is directed counterclockwise. Therefore, according to the…
Q: The magnetic moment for the circular loop with side a and current I is
A: Given, The circular loop with side a And current I
Q: The armature shaft is generally supported at the ends on ball or roller bearings in the D.C.…
A: In DC machine the armature shaft is moving element .
Q: Solenoid has magnetic reluctance of 2.2x10 raised to the (-3). It has 300 turns when the current…
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Q: Inserting air-gap to closed magnetic circuit supplied from fixed current source will reduce the flux…
A: We are authorized to answer one question at a time, since you have not mentioned which one you are…
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- Match the following: (i) Hysteresis loss (a) Can be redud by constructing the core with laminated sheets of alloy steel (ii) Eddy current loss (b) Can be reduced by the use of special high grades of alloy stl as core material.The core of a transformer operating at 50 Hz has an eddy current loss of 100 W/m3 and the corelaminations have a thickness of 0.50 mm. The core is redesigned so as to operate with the same eddycurrent loss but at a different voltage and at a frequency of 250 Hz. Assuming that at the new voltage themaximum flux density is one-third of its original value and the resistivity of the core remains unaltered,determine the necessary new thickness of the laminations. Clear and detailed solution.2. AC-core with a gap of 0.0001m has a coil number of 100 and a current of 10mA. First find the Reluctance of the core given that the Iron core has a negligible reluctance and only the air reluctance contributes to the majority of reluctance. The core has a cross sectional area of 2cm^2. Next find the flux flowing thru the C-core.
- Q.4/ choose true or false: 1. The reluctance of any core is proportional directly with the length of it and inversely with both the permeability and the cross-section area of it. 2. The number of parallel paths in wave windings is equal to twice of the number of poles. 3. In dc machines with same values of Z, N, Ø, the emf for wave winding type is more than emf of lab winding type. 4. If we insert a current in such a conductor subjected to a constant magnetic field, a movement will achieved giving the principle of electric generator.E-06, PC-05. Why are the iron cores of most induction coils laminated? To increase the core permeability. To reduce the core reluctance. To reduce the effects of eddy currents. Click Save and Submit to save and submit. Click Save All Answers to save all answers. MacBook Air 吕0 F2 F3 F4 F5 $4 & 4 5 O 6 7 7 W .. E R .... S » D S F G # 3Question 1 A ferromagnetic core with a relative permeability of 1500 is shown in Figure 2. The dimensions are as shown in the diagram, and the depth of the core is 7 cm. The air gaps on the left and right sides of the core are 0.070 and 0.020 cm, respectively. Because of fringing effects, the effective area of the air gaps is 5 percent larger than their physical size. If there are 400 turns in the coil wrapped around the center leg of the core and if the current in the coil is 1.0 A, what is a) the flux in each of the left, center, and right legs of the core? b) the flux density in each air gap? 7 cm ст ст 30 cm 30 cm 7 cm 400 turns 0.05 cm 30 cm 0.07 cm 7 cm Core depth = 7 cm Figure 2
- Question 1 Select all that apply. Which of the following are considered to be "core losses"? 12R heating loss Flux lines that bulge out at core gaps Currents that circulate within the machine non-ferrous components Field Lines that circulate around conductors and coils Rapid Changes in Domain orientationMagnetic flux densities for HR steel laminations and CRGO are 1.25 T and 1.75 T respectively then ratio of weight of CRGO laminations and HR laminations (Assuming same densities is for two type of core material and total flux remains the same.) ..The function of Copper shading band in induction type energy meter is to ensure flux produced by potential coil is exactly in quadrature with supply voltage. Select one: O True False
- In a certain cast-steel core series magnetic circuit with a 400 turns, 170 At/m, mean length of 0.16 m and 0. 002 square meters cross-sectional area. the value of current to develop a 0.0004 Wb isWhat do you calla closed conducting path? A Node B Short circuit C) Loop JunctionA magnetic circuit has a m.m.f. of 400 AT and a reluctance of 2 x 105 AT/Wb. The magnetic flux in the magnetic circuit is_ mWb. 6 X