x

write short notes on BH curve.

1.3k views

3 Answers

Answer :

BH curve is the graph plotted between B (i.e. flux density) and H (i.e. magnetic field strength). H is taken on x-axis and B is taken on y-axis. Different magnetic materials have different BH curve. And non magnetic material have a straight line instead of curve.
image
 Suppose there is a coil wound on a core, core may be iron core or steel core or any other. And we apply emf to coil. By changing variable resistance we can vary current. If we decrease the resistance current will increase and if we increass the resistance current through the coil will decrease.

 Also remember if the core shape is straight it is called solenoid and if the core shape is circular it is called toroid.

 When we give the emf to coil and variable resistance is at maximum position means current flowing the coil is minimum and as soon as the current is increase coil get magnetize.
image
 Initially the B and H increases slowly but after instep B increases rapidly. And after knee point the B start getting saturated. And at Bmax there is a straight line called saturation. After Bmax the B will not increase further. 

 BH curve is also called as magnetization curve. 
Like 0 like

This is  a very nice and comprehensive answer.
@ibekwe Thanks....

Answer :

B-H curve of magnetic material: 

 The B-H curve is the graphical representation of relation between flux density (B) and applied field strength (H), with H plotted on the x-axis and B plotted on the y-axis. Typical B-H curve is as shown in figure below: 

image

The B-H curve can be described by dividing it into 3 regions. Region OA: For zero current, H = 0 and B is also zero. The flux density B then increases gradually as the value of H is increased. However B changes slowly in this region. Region AB: In this region, for small change in H, there is large change in B. The B-H curve is almost linear in this region. Region beyond B: After point B, the change in B is small even for a large change in H. Finally, the B-H curve will tend to be parallel to X axis. This region is called as saturation region.

Like 0 like

Answer :

image

The B-H curve is the relation between Flux density B in Wb/m2 (on Y Axis) and H in AT/m (on X axis) It is also known as magnetization characteristics. This curve particularly useful to know the characteristics of magnetic material which is generally used to construct pole of an electric machine. It also gives the behavior of the material to get magnetized with rise of current (AT) Initially the material doesn’t have any flux, hence the curve starts at point o. As the process of magnetization starts & current increases, the flux density in the material also increases in proportion with the rise in current. The rise in flux density with rise in current will continue up to point ‘A’ till maximum flux density occurs. At point ‘A’ material gets magnetically saturated and the curve becomes flat (parallel to X axis) 

Like 0 like

Please log in or register to answer this question.

Related Questions


Write short notes on diode.
Last Answer : Diode is made from semiconductor material like silicon or germanium. Diode may use as rectifier which convert AC to DC. It is a electronic component. It is two terminal device, one is anode and second is ... in one direction. Diode is made from P-type and N-type material. Diode have a PN junction.

Show More

119 views 1 answer



Write short notes on Arduino.
Last Answer : Arduino: Arduino is a open source hardware and software. Arduino is a microcontroller. Since Arduino is open source it have many manufacturer. Arduino project was started in about year 2005 ... many sensors to the Arduino. Arduino board have microprocessor, crystal oscillator, 5V voltage regulator.

Show More

254 views 1 answer



Write short notes on:  1) Phosphor characteristics  2) Liquid crystal display

Show More

425 views 0 answers



write short notes on single phase system.
Last Answer : A "phase" in an electrical system is often referred to as the waveform (may be voltage or the current) of the power supply. The waveform in an AC system is typically ... domestic household or commercial supplies and street lighting. Industrial supplies requires three phase electrical supply .

Show More

107 views 1 answer



write short notes on Low-pass filter.
Last Answer : low-pass filter (1) filter exhibiting frequency selective characteristic that allows low-frequency components of an input signal to pass from filter input to output unattenuated all high-frequency components are ... the bandwidth of the filter. A filter whose impulse response is a low-pass signal.

Show More

144 views 2 answers



write short notes on Linear motor.
Last Answer : Normal electrical motor produces rotatory motion same the linear motor produces linear motion. Linear motors have low efficiency. Linear motor can directly produce straight line motion linear motor do not required gears or crank shaft to produce linear motion.

Show More

74 views 1 answer



Why are the notes that I add to my Mac address book being deleted?
Last Answer : answer:If you want to add any extra information, type it in the Note section. You can have Address Book display a picture of the person or any image that you want. To add a picture, just drag any image ... the File menu (or press Command-S). . . . were you doing this last and most important part?

Show More

1 view 1 answer



Is there a free program that will let me sync my notes from my iphone to my computer through itunes?
Last Answer : I am pretty sure mine does it automatically. What version of iPhone OS and iTunes do you have?

Show More

1 view 1 answer



Can you edit iphone "notes" on your mac and then sync to the phone?
Last Answer : no you can not. There isn’t a way to do that right now. Hopefully in the future cause that would be awesome

Show More

2 views 1 answer



What is the expression for calculating vertical curve

Show More

11 views 0 answers



Draw and explain integrated duration curve used in system operation. 
Last Answer : Diagram of integrated duration curve used in system operation: Explanation:  Integrated duration curve is obtained from load duration curve. It is drawn in between load on Y-axis in KW/MW and the X- ... a particular time of a day can also be shown on a curve which is called as mass curve. 

Show More

134 views 1 answer



Explain with diagram load duration curve.
Last Answer : It is drawn from load curve. It is graph of load (MW/KW) arranged in descending order of magnitude with respect to time. 

Show More

168 views 2 answers



The load duration curve for unity load factor will be of  (1) Rectangular shape (2) Triangular shape (3) L -shape (4) I -shape
Last Answer : The load duration curve for unity load factor will be of Rectangular shape

Show More

1.5k views 1 answer



In quadrilateral speed-time curve of electric traction system, the accelerations during successive time periods are ______ respectively.  (A) positive, negative and negative (B) positive, zero and negative (C) positive, positive and negative (D) positive, negative and zero
Last Answer : In quadrilateral speed-time curve of electric traction system, the accelerations during successive time periods are positive, negative and negative respectively. 

Show More

145 views 1 answer



In electric traction for a trapezoidal speed-time curve, the time period is (A) free running speed period = constant speed period (B) free running period = coasting period (C) free running period + coasting period = constant speed period (D) average speed period = scheduled speed period
Last Answer : In electric traction for a trapezoidal speed-time curve, the time period is free running period + coasting period = constant speed period

Show More

332 views 1 answer



Trapezoidal speed-time curve is (A) an exact representation of the conditions in Main-line traction service. (B) an exact representation of the conditions in Suburban traction service. (C) ... in Suburban traction service. (D) a close approximation of the conditions in Mainline traction service.
Last Answer : Trapezoidal speed-time curve is a close approximation of the conditions in Mainline traction service.

Show More

523 views 1 answer




Last Answer : When a bogie negotiates a curve, reduction in adhesion occurs resulting in sliding. Thus sliding is acute when wheel base of axles is more, degree of curvature is more.

Show More

197 views 1 answer




Last Answer : In a load curve the highest point represents peak demand.

Show More

109 views 1 answer




Last Answer : Load curve is useful in deciding the operating schedule of generating units, sizes of generating units, total installed capacity of the plant.

Show More

126 views 1 answer




Last Answer : The area under a load curve gives energy consumed.

Show More

98 views 1 answer




Last Answer : A load curve indicates average kWh (kW) energy consumption during the period.

Show More

80 views 1 answer



What is the largest amount in a legal tender/currency?
Last Answer : Post WWII Hungary printed 100 Quintillion Dollar notes. (learn to use Google, you can find out all this kind of stuff)

Show More

1 view 1 answer



write short notes on thyristor CSI .
Last Answer : Current-source inverter (CSI) is an inverter with a DC current input. Current source inverters are most commonly used in very high power AC motor drives.

Show More

107 views 2 answers



Draw BH Curve and define coercivity and reluctivity.
Last Answer : BH Curve: Definitions: Coercivity: For ferromagnetic material the coercivity is the intensity of the applied magnetic field required to reduce the magnetization of that material to zero after the ... to the ratio of intensity of the magnetic field to the magnetic induction of the material. 

Show More

9 views 1 answer



Given triangle ABC with medians AE, BF, CD; FH parallel and equal in length to AE; BH and HE are drawn; -Maths 9th
Last Answer : answer:

Show More

2 views 1 answer



What is the atomic number of Bh ?
Last Answer : The atomic number of Bh is 107

Show More

0 views 1 answer



What does BH mean?
Last Answer : Need answer

Show More

0 views 1 answer



The magnetic energy of a magnetic material is given by a) BH/2 b) B/2H c) H/2B d) B/H
Last Answer : a) BH/2

Show More

5 views 1 answer



The area of a plane triangle ABC, having its base AC and perpendicular height , is  (A) ½ bh (B) ½ ba sin C (C) ½ bc sin A (D) All the above
Last Answer : (D) All the above

Show More

3 views 1 answer



A triangular section having base b, height h, is placed with its base horizontal. If the shear stress at a depth y from top is q, the maximum shear stress is (A) 3S/bh (B) 4S/bh (C) 4b/Sh (D) 3b/bS
Last Answer : (A) 3S/bh

Show More

32 views 1 answer



What is the output of the following code AX = 37D7H, BH = 151 decimal DIV BH a) AL = 65H, AH= 94 decimal b) AL= 5EH, AH= 101 decimal c) AH= E5H, AL= 5EH d) AL= 56H, AH= 5EH
Last Answer : b) AL= 5EH, AH= 101 decimal

Show More

170 views 1 answer



What is the output of the following code CF =0, BH = 179 RCL BH, 1 a) CF=0, OF= 1, BH= 01100101 b) CF=1, OF=1, BH=01100110 c) CF=1, OF =0, BH= 01001101 d) CF=0, OF=0, BH=00101100
Last Answer : c) CF=1, OF =0, BH= 01001101

Show More

47 views 1 answer



What is the output of the following code AL= 49 BCD, BH= 72 BCD SUB AL, BH DAS a) AL=D7, CF=1. b) AL=7D, CF=1. c) AL=77, CF=1 d) none of them.
Last Answer : d) none of them.

Show More

42 views 1 answer



What is the shear stress acting along the neutral axis, over a triangular section? a. 2.66 (S/bh) b. 1.5 (S/bh) c. 0.375 (S/bh) d. None of the above
Last Answer : a. 2.66 (S/bh)

Show More

35 views 1 answer



Write short notes on the following terms: Homogeneous Society,Migrants. -SST 10th
Last Answer : Homogeneous Society: A society that has similar kinds of people, especially where there are no significant ethnic differences. Migrant: Anybody who shifts from one region or country to another region within a country or to another country, usually for work or other economic opportunities.

Show More

0 views 1 answer



Write short notes to show what you know about: The Gutenberg press -SST 10th
Last Answer : 1) Johann Gutenberg developed the first known printing press in the 1430s. Gutenberg was the son of a merchant and grew up on a large agricultural estate. He had seen the wine and olive presses ... standards of the time this was fast production. It was in fact a revolution in the print technology.

Show More

0 views 1 answer



Write short notes to show what you know about: Erasmus's idea of the printed book -SST 10th
Last Answer : Erasmus was a latin secular and a catholic reformer. Like Martin Luther he criticized the excesses of Catholicism but unlike him, he was not grateful to print. He expressed a deep anxiety about printing. ... than good to society. Because of this the value of good content would be lost in the din.

Show More

0 views 1 answer



Write short notes to show what you know about The vernacular press act -SST 10th
Last Answer : The vernacular press act was passed in 1878, modeled on the Irish Press Laws, to curtail the freedom of the Indian-language press. Proposed by Lord Lytton, then viceroy of India, the ... ignored the warning, the government had right to seize the press and confiscate the printing machinery.

Show More

0 views 1 answer



Write short notes on : (a) The Epistolary Novel (b) The Serialised Novel -SST 10th
Last Answer : (a) With the growth of readership of novels, different styles of writing novels were adopted by the writers. Episolatory novels were written in the form of letters. They were private and personal ... . Charles Dickens' The Pickwick Papers was the first novel to be serialised in England in 1836.

Show More

5 views 1 answer



Write short notes on : (i) Rokeya Hossein (ii) Hannah Mullens and (iii) Sailabala Ghosh Jaya. -SST 10th
Last Answer : (i) Rokeya Hossein (1880-1932), a widow and a reformer, she started a girl's school in Calcutta. Her first novel Sultana's Dream was a fantasy and written in English. She painted a world where ... We can see from the above examples how women were worried from reading in Bengal as it was in South.

Show More

0 views 1 answer



Write short notes on one-party system. -SST 10th
Last Answer : One-party system is followed in China, North Korea and Cuba. This system was also prevalent in USSR till its breakup into 15 independent states. They are mostly communist countries.There is no ... from. The one-party system is like a dictatorship, where people have to follow government policies.

Show More

0 views 1 answer



Write short notes on : -SST 10th
Last Answer : (i) The Indian National Congress is one of the oldest political parties in the world, and is India's oldest political party. It is a party which is neither leftist nor rightist in ... Pradesh, Chhattisgarh, Uttarakhand, Delhi and Punjab. It has formed government in Uttar Pradesh several times.

Show More

0 views 1 answer



Write short notes on: -SST 10th
Last Answer : (i) On January 1,1942 the representatives of 26 states met at Washington. The signatories to this Declaration promised to continue war against the enemy collectively and not to make separately ... the decision how to deal with Germany and non-German territories which had been liberated from Germany

Show More

0 views 1 answer



With reference to organisation fighting for Human Rights, write short notes on the following UN Human Rights Commission. -SST 10th
Last Answer : UN Human Rights Commission: It was set up by the Economic and Social Council. The Commission held its first full fledged session in January, 1947. It had been given the task of drafting ... 10, 1948. The Commission has many working groups to investigate Human Rights problem in different countries.

Show More

0 views 1 answer



7. Write a short paragraph explaining to Roshan why the lions are shown on our currency notes. List at least one other object on which you see them. -History
Last Answer : Ans: The lions are part of the Lion Capital in Samath. These lions are shown on our currency notes in honour of one of the greatest kings of India, Ashoka, who built the Capital. Moreover, on independence, the lion was recognized as the national animal, so the notes also showed the Lion Capital.

Show More

0 views 1 answer



Write short notes on the following terms: 1. Information retrieval 2. E_banking -Technology
Last Answer : 1. Information retrieval It refers to the process of accessing the information that is stored on the Internet.2. E-banking It refers to the automated delivery of new and traditional banking products ... sharing common views and ideas that come together to meet and discuss topics of their interest.

Show More

0 views 1 answer



Write short notes on LAN and WAN. -Technology
Last Answer : LANA Local Area Network (LAN) is a computer network covering a small geographical area like a home, office or small group of buildings such as buildings in a school. Computers connected to a ... so that users and computers in one location can communicate with users and computers in other locations.

Show More

3 views 1 answer



Write short notes on neural coordination? -Biology
Last Answer : answer:

Show More

0 views 1 answer



Write short notes on nucleic acids. -Biology
Last Answer : answer:

Show More

0 views 1 answer



Write short notes on neural coordination? -Biology
Last Answer : answer:

Show More

2 views 1 answer


Show More⇦ PreviousNext ⇨