The path of the magnetic flux in a transformer has : (A) High reluctance (B) Low resistance (C) High conductivity (D) Low reluctance
Low reluctance

1 Answer

Answer :

low reluctance path

Related questions

Description : 68 The path of a magnetic flux in a transformer should have A. High resistance B. High reluctance C. Low resistance D. Low reluctance

Last Answer : D. Low reluctance

Description : The path of magnetic flux in a transformer should have?

Last Answer : The path of magnetic flux in a transformer should have low reluctance.

Description : An electron is travelling at right angles to a uniform magnetic field of flux density 1.2 mT with a speed of 8 × 106 m s-1, the radius of circular path followed by electron is A. 3.8 cm B. 3.7 cm C. 3.6 cm D. 3.5 cm

Last Answer : 3.8 cm

Description : Magnetic materials (A) provide path to magnetic flux. (B) are good insulators. (C) are semiconductors. (D) None.

Last Answer : (A) provide path to magnetic flux.

Description : Materials, which provide a path to the magnetic flux, are classified as (A) insulating materials. (B) semi conducting materials. (C) magnetic materials. (D) dielectric materials.

Last Answer : (C) magnetic materials.

Description : In transformer, the core is made up of soft iron in order to pass the maximum A. flux B. current C. magnetic flux D. voltage

Last Answer : magnetic flux

Description : 27] In a transformer, the leakage flux of each winding is proportional to the current in that winding because A. Ohm's law applies to magnetic circuits B. Leakage paths do no saturate C. the two windings are electrically isolated D. mutual flux is confined to the core

Last Answer : B. Leakage path do not saturate

Description : 43 The purpose of providing an iron core in a transformer is to A.Provide support to windings B. Reduce hysteresis loss C. decrease the reluctance of the magnetic path D. reduce eddy current losses

Last Answer : C. Decrease the reluctance of the magnetic path

Description : The core of a transformer (medium size) uses to provide high flux densities (a) diamagnetic (c) ferromagnetic core (b) paramagnetic (d) none of these

Last Answer : The core of transformer is made up colled rolled grain oriented. It is a ferromagnetic material..

Description : Define the following terms: i) Magnetic flux density, ii) Reluctance, iii) Magneto-motive force, iv) Permeance.

Last Answer : (i) Magnetic flux density (B): It is the magnetic flux per unit area measured at right angles to the flux path. (Its unit is weber/m2 or tesla).  (ii) Reluctance: It is the ... flux to set up through it and it is reciprocal of reluctance. Permeance = 1/ Reluctance. Unit: weber/ampere.

Description : Define magnetic flux density and state its formula.

Last Answer : The magnetic flux per unit area is called as magnetic flux density. Magnetic flux density is denoted by B. The formula for magnetic flux density is Weber per metre square or Tesla. Mathematically ... the unit of magnetic flux density is Weber per metre square which is also called as Tesla.

Description : Which of the following is a unit of magnetic flux? A) Weber B) Maxwell C) Both A and B D) None of these

Last Answer : Which of the following is a unit of magnetic flux? A) Weber B) Maxwell C) Both A and B D) None of these

Description : Unit of flux density in magnetic circuits is ______________. A. Tesla B. dB C. Weber D. Hz 

Last Answer : Unit of flux density in magnetic circuits is Weber.

Description : If the cross-sectional area of a magnetic field increases, but the flux remains the same, the flux density: A. increases B. decreases C. remains the same D. doubles

Last Answer : If the cross-sectional area of a magnetic field increases, but the flux remains the same, the flux density: decreases

Description : Which of the following statements holds for the divergence of electric and magnetic flux densities?  A) Both are zero B) These are zero for static densities but non zero for time varying densities C) It is zero for electric flux density D) It is zero for magnetic flux density

Last Answer : Which of the following statement holds for the divergence of electric and magnetic flux densities ?  (A) Both are zero (B) These are zero for static densities but non zero for time varying densities. (C) It is zero for the electric flux density (D) It is zero for the magnetic flux density

Description : When a conductor cuts magnetic flux, an emf is induced in the conductor. This is known as  (a) Joule's law (b) Faraday's law (c) Coulomb's law (d) Ampere’s law

Last Answer : When a conductor cuts magnetic flux, an emf is induced in the conductor. This is known as Faraday's law. There are two Faraday's law of electromagnetic induction. 1. Changing flux produces emf ... 2. Magnitude of induced e.m.f. is directly proportional to rate of change of flux linkage.

Last Answer : The material used for the magnetic circuit where high value of flux density required is ferro cobalt.

Description : The property of a material which opposes the creation of magnetic flux in it is known as?

Last Answer : The property of a material which opposes the creation of magnetic flux in it is known as reluctance.

Description : The unit of magnetic flux is?

Last Answer : The unit of magnetic flux is weber.

Description : Component A is diffusing in a medium B. The flux NA relative to a stationary point is equal to the flux due to molecular diffusion, if (A) Mass transfer is accompanied by reaction (B ... stagnant medium B (C) Molecular mean free path is high (D) There is equimolar counter diffusion

Last Answer : (D) There is equimolar counter diffusion

Description : What is primary leakage flux in transformer ?

Last Answer : The leakage flux caused by the magnetomotive force ( mmf) due to the primary ampere turn is called primary leakage flux when it produces a leakage path from the primary winding. This was the second ... answer regarding Transformer. I will appear with the 3rd episode in the future. So stay with us.

Description : What is the mutual flux of transformer ?

Last Answer : Answer : Connecting AC , CERS to any one of the coils of the transformer creates a variable magnetic force line in the coil , which intersects the adjacent coil. As a result, voltage is ... , this induced voltage is the transformer voltage and this variable magnetic force line is called mutual flux.

Description : Transformer cores are laminated to reduce _____________. A. eddy currents B. secondary flux C. leakage flux D. all of the above

Last Answer : Answer: A

Description : Find the electric flux density surrounding a material with field intensity of 2xyz placed in transformer oil ( εr = 2.2) at the point P(1,2,3) is (in 10 -10 units) a) 2.1 b) 2.33 c) 2.5 d) 2.77

Last Answer : c) 2.5

Description : What effect does flux leakage in a transformer have on the coefficient of coupling (K) in the transformer?

Last Answer : it causes K to be less than unity (I).

Description : What effect does flux leakage in a transformer have on the coefficient of coupling (K) in the transformer?

Last Answer : it causes K to be less than unity (I).

Description : The induced current in transformer which produced in the direction perpendicular to flux, is known as: a. Conventional current b. electronic current c. Perpendicular current d. Eddy current

Last Answer : c. Perpendicular current

Description : An ideal transformer always obeys the law of conservation of........: a. energy b. momentum c. charge d. Flux

Last Answer : b. momentum

Description : [53] The iron loss of the transformer is negligible during short circuit test because A. The entire input is just sufficient to meet Cu losses only B. Flux produced is a small fraction of the normal flux C. Iron core becomes fully saturated D. Supply frequency is held constant

Last Answer : B. Flux produced is a small fraction of the normal flux

Description : 38] In a transformer the energy is conveyed from primary to secondary? A. Through cooling coil B. Through air C. By the flux D. None of the above

Last Answer : C. By the flux

Description : 12] Which is not the basic element of the transformer? A. core B. primary winding C. secondary winding D. mutual flux

Last Answer : D. Mutual flux

Description : The emf induced in the primary of a transformer (A) is in phase with the flux. (B) lags behind the flux by 90 degree. (C) leads the flux by 90 degree. (D) is in phase opposition to that of flux.

Last Answer : (C) leads the flux by 90 degree.

Description : 6 The value of flux involved in the emf equation of a transformer is A. rms value B. rms value C. Maximum value D. Instantaneous value

Last Answer : C) maximum value

Description : The core flux of a practical transformer with a resistive load  A) Is strictly constant with load changes B) Increases linearly with load C) Increases as the square root of the load D) Decrease with increased load

Last Answer : The core flux of a practical transformer with a resistive load Is strictly constant with load changes

Last Answer : The use of higher flux density in the transformer design reduces weight per kVA.

Last Answer : The leakage flux in a transformer depends upon load current.

Last Answer : Power on primary and secondary side of transformer A. Remains Approximately constant B. Are always different C. Is always 100kVA D. None of these

Description : Those magnetic materials are best suited for making armature and transformer cores which have____permeability and_______hystersis loss.

Last Answer : Those magnetic materials are best suited for making armature and transformer cores which have high permeability and low hystersis loss.

Description : iv) A rectangular coil free to rotate is placed in uniform magnetic field with its plane parallel to the magnetic lines of force. Then the coil willa) rotate to maximize the magnetic flux through ... since the magnetic flux through its plane is zero.d) experience the constant torque equal to NBIA

Last Answer : iv) A rectangular coil free to rotate is placed in uniform magnetic field with its plane parallel ... d) experience the constant torque equal to NBIA

Description : Which of the following figure shown the magnetic flux denstiy b at a distance r from a long straight rod carrying a steady current I ?

Last Answer : Which of the following figure shown the magnetic flux denstiy b at a distance r from a long straight rod carrying a steady current I ? A. B. C. D.

Description : Magnetic flux in a circular coil of resistance `10Omega` changes with time as shown in figure. `otimes` direction indicates a direction perpendicular

Last Answer : Magnetic flux in a circular coil of resistance `10Omega` changes with time as shown in figure ... to paper inwards. Match the following table.

Description : Match the following `{:(,,"Table-1",,"Table-2"),(,(A),L,(P),[M^(0)L^(0)T^(-2)]),(,(B),"Magnetic Flux",(Q),[ML^(2)T^(-2)A^(-1)]),(,(C),LC,(R),[ML^(2)T^

Last Answer : Match the following `{:(,,"Table-1",,"Table-2"),(,(A),L,(P),[M^(0)L^(0)T^(-2)]),(,(B),"Magnetic Flux",(Q) ... (-2)A^(-2)]),(,(D),CR^(2),(S),"None"):}`

Description : S.I. unit of Magnetic flux is – (1) weber (2) weber/m (3) weber/m⁴ (4) weber-m²

Last Answer : (1) weber Explanation: The SI unit of magnetic flux is the Weber (Wb) (in derived units: volt-seconds). It is the magnetic flux that, linking a circuit of one turn, would produce in it ... second. It is named after the German physicist Wilhelm Eduard Weber. The CGS unit of magnetic flux is Maxwell.

Description : Tesla is a unit of magnetic – (1) flux (2) induction (3) moment (4) field

Last Answer : (4) field Explanation: The tesla (symbol T) is the SI derived unit used to measure magnetic fields. Testa can be measured in different ways; for example, one tesla is equal to one Weber per ... Measures (CGPM). It was named in honor of the physicist electrical engineer, and inventor, Nikola Tesla.

Description : Which physical quantity is measured in ‘siemens’? (1) Electric potential (2) Electrical conductance (3) Magnetic flux (4) Refractive index

Last Answer : (2) Electrical conductance Explanation: The Siemens is the unit of electric conductance, electric susceptance and electric admittance in the International System of Units (SI).

Description : The rotor of a synchronous motor operates in synchronism with the rotating field because ______________. A. of the amortisseur windings B. the rotor is magnetically locked into step with the ... field strength varies directly with rotor slip D. the stator flux rotates in the opposite direction

Last Answer : Answer: B

Description : A shading coil used in an AC magnetic controller, functions to _____________. A. reduce vibration and noise in the contactor B. prevent flux buildup in the operating coil C. eliminate arcing when the contacts close D. energize the operating coil and 'pull in' the contacts

Last Answer : Answer: A

Description : A spot on the sun’s visible surface where the magnetic flux lines converge? A. Sunspot B. Filament C. Solar spot D. Prominence

Last Answer : A. Sunspot

Description : An advantage of optic fiber rejecting an induced noise signals from magnetic field or solar storms flux. A. Electric hazard B. Cross talk C. Immunity to noise D. Shielding

Last Answer : C. Immunity to noise

Description : If the Earth's magnetic field lines pass through the Hall probe in opposite direction, then the change in reading of voltmeter is A. thrice the Earth's magnetic flux density B. four times the Earth ... C. five times the Earth's magnetic flux density D. twice the Earth's magnetic flux density

Last Answer : twice the Earth's magnetic flux density