# What is the permissible flux density in case of cold rolled grained oriented steel?

What is the permissible flux density in case of cold rolled grained oriented steel?

The permissible flux density in case of cold rolled grained oriented steel is 1.7 Wb/m2.

## Related questions

Answer : Flux density is denoted by B. And it is given as B = flux/ area Where, the unit of flux is Weber and unit of area is meter square. So the unit of flux density is weber per meter square which is also called as Tesla.

Description : In an induction motor if the flux density is reduced to one-half, of its normal value then the torque will  (1) reduce to one-half (2) reduce to one-fourth (3) remain unchanged (4) increase four times

Answer : In an induction motor if the flux density is reduced.to one-half, of its normal value then the torque will reduce to one-fourth

Description : Flux density formula

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

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 : Give the relation between magnetic field strength, magnetic flux density and permeability.

Description : Define magnetic flux density and state its formula.

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.

Answer : If B is the flux density, I the length of conductor and v the velocity of conductor, then induced e.m.f. is given by Blv.

Description : The permissible voltage variation in transmission and distribution system is:  (A) ± 0.1% (B) ± 1% (C) ±10% (D) ± 25%

Answer : The permissible voltage variation in transmission and distribution system is: ±10%

Description : Justify the statements. 1. IGBT uses a vertically oriented structure. 2. IGBT is preferred as a power switch over both power BJT and MOSFET. 3. Punch through IGBT structure are more popular and are widely used.

Answer : 1. IGBT uses vertically oriented structure. IGBT use vertically oriented structure to reduce the resistance and to increase the current flow area. Hence IGBT uses vertically oriented ... DC circuit applications. Hence punch through IGBT structure are more popular and are widely used.

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

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

Description : The function of steel wire in ACSR conductors is (A) To take care of surges. (B) To reduce corona. (C) To reduce inductance. (D) To provide additional mechanical strength

Answer : The function of steel wire in ACSR conductors is To provide additional mechanical strength

Description : Which of the following is the advantage of using CRGO steel in transformers? A) High magnetic flux density B) Low permeability C) Both A and B D) None of these

Answer : It definitely High Magnetic Flux Density since a crgo steel has always a more around 3% of silicon proportion among the remaining ferrite which make cold rolled grain oriented steel having high flux magnetic ... for more about the crgo core you can learn here https://nicoreindia.com/crgo-core/

Description : Silicon steel is used in electrical machines because it has?

Answer : Silicon steel is used in electrical machines because it has low hysteresis loss.

Description : Hard steel is suitable for making permanent magnets because?

Answer : Hard steel is suitable for making permanent magnets because it has good residual magnetism.

Description : How to care for your skin during the cold season?

Answer : How to care for your skin during the cold season? The skin of our hands and face is influenced by climatic conditions. The cold on the face and hands constricts blood vessels, so blood circulation is ... is necessary to drink a sufficient amount of liquid - at least 1.5 liters of water per day.

Description : Explain cold rolling, a four high rolling mill is usually used.

Answer : This type of machine consist of four rolls, two smaller in size and other two bigger in size 1) The actual rolling is done by small size wheels and other two bigger wheels provide backup and ... rolling process different types of shapes are formed. Those are I-section, Tsection, etc.

Description : Compare between Hot rolling and Cold rolling.

Answer : Hot rolling Cold rolling  Metal is fed to the rolls after being heated above the recrytallization temperature. Metal is fed to the rolls when it is below the recrytallization temperature. ... Hot rolling is the father of the cold rolling. Cold rolling follows the hot rolling.

Description : Which of the following is a cold cathode lamp ?  (A) Mercury vapour lamp (C) Incandescent lamp (B) Sodium vapour lamp (D) Neon lamp

Answer : Which of the following is a cold cathode lamp ?  (A) Mercury vapour lamp (C) Incandescent lamp (B) Sodium vapour lamp (D) Neon lamp

Description : The hot resistance of the bulb's filament is higher than its cold resistance because the temperature co-efficient of the filament is?

Answer : This  is  because  resistance  of  a  conductor  increases  with  increase  in  temperature .

Description : In lead acid battery the density of acid indicates the  (1) charge of the battery (2) level of acid (3) e.m.f of the battery (4) damage of the plates

Answer : In lead acid battery the density of acid indicates the charge of the battery

Description :  An energy signal has G(f) = 20. Its energy density spectrum is A) 20 B) 100 C) 400 D) 800

Answer :  An energy signal has G(f) = 20. Its energy density spectrum is 400

Description : In a synchronous machine, if the field flux axis ahead of the armature field axis in the direction of rotation, the machine is operating as  (1) synchronous motor (2) synchronous generator (3) asynchronous motor (4) asynchronous generator

Answer : In a synchronous machine, if the field flux axis ahead of the armature field axis in the direction of rotation, the machine is operating as synchronous generator

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

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

Description : Define the following terms and state their units: (i) Luminous intensity, (ii) Luminous flux

Answer : i) Luminous intensity: This is defined as the luminous flux emitted into a solid angle of space in a specific direction. Its unit is the candela.  OR  The luminous flux per unit solid angle ( ... energy radiated by the light source in all direction. The unit of luminous flux is lumen (lm)

Description : Describe the concept of leakage flux, useful flux and fringing with neat diagram.

Description : Define useful flux, leakage flux and fringing.

Description : Explain the leakage flux and its effect with the help of neat diagram.

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

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 : It is possible to increase the field flux and, at the same time, increase the speed of a d.c. motor provided its .......... is held constant.

Answer : It is possible to increase the field flux and, at the same time, increase the speed of a d.c. motor provided its armature current is held constant.

Description : The unit of magnetic flux is?

Answer : The unit of magnetic flux is weber.

Answer : Interpole flux should be sufficient to neutralise both the armature reaction flux as well as commutating e.m.f. induced in the coil.

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

Description : Case control studies is called as A. Drug-oriented systems. B. Dose-oriented systems. C. Disease-oriented systems. D. Complication-oriented systems.

Description : On a cold day when the room temperature is 15°C, the metallic cap of a pen becomes much colder than its plastic body, though both are at the same temperature of 15°C, because : (1) metals ... metals (3) metals are good conductors of heat (4) plastics have a higher thermal conductivity than metals

Answer : metals are good conductors of heat

Description : The eddy current loss in a dc generator is 400 W at 40 Hz frequency of reversal and constant flux density. When frequency is increased to 50 Hz., eddy current loss is :  (A) 256 W (B) 320 W (C) 500 W (D) 625 W

Answer : The eddy current loss in a dc generator is 400 W at 40 Hz frequency of reversal and constant flux density. When frequency is increased to 50 Hz., eddy current loss is : 625 W

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

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

Description : The amount of matter in a ball of steel is its : (1) Weight (2) Mass (3) Density (4) Volume

Description : Two rods, one of copper and other of steel, experience the same upthrust when placed in water.Thus, both have (1) equal volume (2) equal weight (3) equal density (4) equal mass

Description : D=(2y2+z)ax+4xyay+xa2c/m2

Description : Flux density

Description :  Highest flux density exists inside which of the following instruments? A) Electrodynamic instruments B) Hot wire instruments C) Moving iron instruments D) Moving coil instruments

Answer : Highest flux density exists inside which of the following instruments? A) Electrodynamic instruments B) Hot wire instruments C) Moving iron instruments D) Moving coil instruments

Description : A dielectric material is said to be linear if the electric flux density varies (A) non-linearly with electric field (B) linearly with electric field (C) linearly with the permittivity (D) non-linearly with electric potential

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

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

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

Description : The maximum flux in a transformer is φm when primary voltage is V and the frequency is f. If the primary voltage is 2 V and frequency is f/2, the flux will be (a) 4 φm (b) 0.25 φm (c) φm (d) 0.5 φm

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

Answer : The value of flux involved in the e.m.f. equation of a transformer is maximum value.

Answer : Silicon steel used in laminations mainly reduces hysteresis loss.

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

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

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