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  • 2 answers

Prachi Sethi 5 years, 4 months ago (1035854)

https://youtu.be/pIj-JQcBb9I

Unknown Student 5 years, 4 months ago (9749507)

X(x-1) (x-5)
  • 1 answers

Paru ? 5 years, 4 months ago (9124897)

• a+b+c=-b/a • ab+bc+ca=c/a • abc=-d/a Here, a is alpha, b is beta & c is gamma
  • 0 answers
  • 1 answers

Kruthika S.H. 5 years, 4 months ago (9238319)

The girl's body shape will also begin to change. There may be an increase not only in height and weight, but the hips may get wider as well. There may also be an increase in fat in the buttocks, legs, and stomach. These are normal changes that may happen during puberty
  • 1 answers

Ravi Ranjan 5 years, 4 months ago (7341242)

Ravi Ranjan
  • 1 answers

Yogita Ingle 5 years, 4 months ago (2577571)

Symbol of following 

 

  • 1 answers

Unknown Student 5 years, 4 months ago (9749507)

• In a democratic country, every citizen have their own self respect. • Everyone is equal and have equal rights which no one can take it from them. • Every citizen is important in a democratic country and have right to vote.
  • 1 answers

Gaurav Seth 5 years, 4 months ago (2898529)

Electric Motor

Electric Motor is a device which converts electrical energy into mechanical energy.

Principle of Electric Motor

The principle of the electric motor is based on the fact that a current carrying conductor produces a magnetic field around it. A current carrying conductor placed perpendicular to magnetic field experiences a force.

Construction of Electric Motor

(1) Armature coil

It consist of a single loop of an insulated copper wire in the form of a rectangle.

(2) Strong field magnet

Armature coil is placed between 2 pole pieces of a strong magnet which provide strong magnetic field.

(3) Split ring type commutator

It consist of 2 halves of a metallic ring.The two ends of armature  coil are connected to these 2 halves of ring.Commutators reverses the direction of current in armature coil.

(4) Brushes

Two carbon brushes press against the commutator.These brushes act as contact between commutator and terminal battery.

(5) Battery

It is connected across the carbon brushes.It supplies current to the armature coil.

Working of Electric Motor

1)In the side AB of the rectangular cil ABCD, the direction of current is from A to B and in the side CD of the coil, the direction of current is from C to D.The direction of magnetic field is from N pole of the magnet to its S pole.

2) Applying Fleming’s Left hand rule to sides AB and CD of the coil, the force on side AB of the coil is in downward direction whereas the force on side CD of the coil is in upward direction. Due to this the side AB of the coil is pushed down and side CD is pushed up.This makes the coil ABCD rotate in the anticlockwise direction.

3) While rotating, when the coil reached vertical position, then the brushes will touch the gap between the two commutator rings and current of the coil is cut off. Though the current to the coil is cut off when it is in the exact vertical position, the coil does not stop rotating because it has already gained momentum due to which it goes beyond the vertical position.

4) After half rotation, when the coil goes beyond vertical position, the side CD of the coil comes on the left side whereas side AB of the coil comes to the right side, and the two commutator half rings automatically change contact from one brush to the other.

5) After half rotation of the coil , the commutator half ring R2 makes contact with brush B1 whereas the commutator half ring R1 makes contact with brush B2.This reverse the direction of current in the coil.

6) The reversal of direction of current reverses the direction of force acting on the sides AB and CD of the coil.The side CD of the coil is now on the left side with a downward force on it whereas the side AB is now on the right side with an upward force on it.Due to this the side CD of the coil is pushed down and the side AB of coil is pushed up.This makes the coil rotate anticlockwise by another half rotation.

7) The reversing of current in the coil is repeated after every half rotation due to which the coil continue to rotate as long as current from the battery is passed through it.

  • 1 answers

Yogita Ingle 5 years, 4 months ago (2577571)

Changes which occur in boys during puberty are:

  • Hair grow on the face in the form of moustache and beard, and on the chest.
  • Voice deepens in boys.It becomes low pitched voice.
  • Testes start to make sperm.
  • Testes and ***** become larger.
  • Chest and shoulders of boys broaden.
  • Body become muscular.
  • 5 answers

Vanshika Kumari 5 years, 4 months ago (9582066)

92232

Nakshatra Meghana 5 years, 4 months ago (9756364)

92232

Yogita Ingle 5 years, 4 months ago (2577571)

854 x 102

854 (100 + 2)

= 85400 + 1,708

= 87,108

Prince Lakhani 5 years, 4 months ago (9118210)

87108

Aarya Patel 5 years, 4 months ago (9483615)

87108
  • 2 answers

Yogita Ingle 5 years, 4 months ago (2577571)

The chemical properties of metals.

  • The density of metals is usually high.
  • Metals are malleable and ductile.
  • Metals form an alloy with other metals or non – metals.
  • Some metals react with air and corrode. For e.g. Iron.
  • Metals are good conductors of heat and electricity. Lead is an exception.
  • Generally, metals are in a solid state at room temperature. Except for Mercury. Mercury is in a liquid state.

The chemical properties of nonmetals

  • Nonmetals are poor conductors of heat and electricity. Graphite and Gas carbon are exceptions.
  • Unlike metals, nonmetals aren’t malleable and ductile.
  • Nonmetals react more with metals than with nonmetals.
  • Usually, nonmetals react with other nonmetals in high temperature.
  • Most nonmetals do not react with air in room temperature.
  • White phosphorus is the only nonmetal that reacts with air to form its oxide by burning.

Karan Dhiman 5 years, 4 months ago (6980700)

Metals soluble, malleable,ductile,hard,shiny, change in thin **** by hit And nonmetals are opposite of metals
  • 5 answers

Anuradha Yadav 5 years, 3 months ago (9821048)

Hii

Tirath Kumar 5 years, 4 months ago (9748971)

Shivani

Akashay Kumar. 5 years, 4 months ago (9744056)

Thanks

Priya Saptasagar 5 years, 4 months ago (9222182)

ಕಣಕ

Priya Saptasagar 5 years, 4 months ago (9222182)

What is the best of luck
  • 3 answers

Abhinandan Dubey 5 years, 4 months ago (9605763)

1) Nylon fibre is very strong and elastic. 2) It is light and wrinkle resistant. 3) It is easy to wash and it absorbs less water, and so it can be dried quickly.

Prachi Sethi 5 years, 4 months ago (1035854)

https://youtu.be/pIj-JQcBb9I

Bhumi Kumari 5 years, 4 months ago (8980241)

1) Nylon fibre is very strong and elastic. 2) It is light and wrinkle resistant. 3) It is easy to wash and it absorbs less water, and so it can be dried quickly.
  • 4 answers

Sana K.A 5 years, 4 months ago (9684985)

Dera gazhikhan In Pakistan

Abhinav Kumar 5 years, 4 months ago (4989825)

Jxj

Mansi Sharma 5 years, 4 months ago (9753006)

The king wanted the tree to be cut because

Kaniskha Saini 5 years, 4 months ago (9751588)

Chapter 1 ka answer
  • 1 answers

Ayush Pandey 5 years, 4 months ago (8764566)

It is the method by which the value of a variable in equation 1 is substituted in another equation and the value of the other variable in equation 2 is substituted in equation 1 or equation 3 made by equation 1. Let's understand it with an example: x+y=2............. eq 1 x-2y=1............. eq 2 In equation 1, x+y=2 x=y-2............. eq 3 substituting the value of x in equation 2 x-y=1 (y-2) -2y=1 y-2-2y=1 -y-2=1 -y=1+2 -y=3 [y= -3] Substituting the value of y in equation 3 x=y-2 x=-3-2 [x=-5] Hope you understood.
  • 1 answers

Tirath Kumar 5 years, 4 months ago (9748971)

Noun
  • 3 answers

Pradnya Kumbhar 5 years, 4 months ago (9052007)

Crops which are sown in rainy season are called kharif crops . The rainy season in India is generally from June to September. These crops need more water.

Raju Shamar 5 years, 4 months ago (9453349)

What tasks ,do you

Dev Pratap Singh Singh 5 years, 4 months ago (9732267)

The crops which are sown in the rainy season are called kharif crops. The rainy season in India is generally from June to September. Paddy,maize,soyabean,groundnut,cotton,etc.,are kharif crops
  • 1 answers

K J Tech 5 years, 4 months ago (7816226)

Law refer to the legal agreement
  • 1 answers

Shraddha ✨✰✰ 5 years, 4 months ago (9630010)

बाजारुपन से तात्पर्य ऊपरी चमक-दमक से है। जब सामान बेचने वाले बेकार की चीजों को आकर्षक बनाकर मनचाहे दामों में बेचने लगते हैं, तब बाज़ार में बाजारुपन आ जाता है,इसके अलावा धन को दिखावे की वस्तु मान कर व्यर्थ में उसका दिखावा करने वाले ग्राहक भी बाजार में बाजारूपन लाने में सहायक होते हैं। जो विक्रेता, ग्राहकों का शोषण नहीं करते और छल-कपट से ग्राहकों को लुभाने का प्रयास नहीं करते साथ ही जो ग्राहक अपनी आवश्यकताओं की चीजें खरीदते हैं वे बाजार को सार्थकता प्रदान करते हैं। इस प्रकार विक्रेता और ग्राहक दोनों ही बाज़ार को सार्थकता प्रदान करते हैं। मनुष्य की आवश्यकताओं की ज्यादा से ज्यादा पूर्ति करने में ही बाजार की सार्थकता है। आशा करती हूँ , कि ये ans. आप की study में helpfull होगा |
  • 5 answers

Avni Pawar 5 years, 4 months ago (9775678)

Prathiba patil

Chandrashekar Murgad 5 years, 4 months ago (7676329)

Pratibha Patil

Mohini Ladiya 5 years, 4 months ago (9748311)

Pratibha Patil is first president of India?‍?

Abhigyan Abhinav 5 years, 4 months ago (10375154)

Pratibha Patil

Yangzee Sherpa 5 years, 4 months ago (9213862)

?Pratibha Patil? HoPe It HeLpS yOu??
  • 2 answers

Prem Shankar Upadhyay 5 years, 3 months ago (5632325)

Sale batana ho toh batao Motivation nhi chahiye bhag

Paru ? 5 years, 3 months ago (9124897)

Agar tum dil lagake padoge to sub samajme ajayega?
  • 2 answers

Vandana Thakur 4 years, 11 months ago (9650151)

Thank you...for the answer

Yogita Ingle 5 years, 4 months ago (2577571)

Direct development

Indirect development

It is a type of development in which an embryo develops into a mature individual without involving a larval stage.

 

 

 

1.

It is a type of development that involves a sexually-immature larval stage, having different food requirements than adults.

Metamorphosis is absent.

2.

Metamorphosis involving development of larva to a sexually-mature adult is present.

It occurs in fishes, reptiles, birds, and mammals.

3.

It occurs in most of the invertebrates and amphibians.

  • 4 answers

Abhinandan Dubey 5 years, 4 months ago (9605763)

Fibre

Dipanshu Marodia 5 years, 4 months ago (9628580)

Fabric is made up of fibre

Prachi Sethi 5 years, 4 months ago (1035854)

https://youtu.be/pIj-JQcBb9I

Kartik Kumar 5 years, 4 months ago (9720343)

Fibre
  • 5 answers

Sohini Nandi 5 years, 4 months ago (9624545)

The writer had heard a lot about Miss Beams new teaching method. So he visited her school to see the play method personally.

Hanikha Naidu 5 years, 4 months ago (9240017)

The writer had heard a lot about Miss . Beam school . So because of curiosity he visited Miss Beam school...

Devika S S 5 years, 4 months ago (8830678)

Ans:The writer had heard a lot about Miss. Beam's school. So because of curiosity he visited Miss Beam's school..

Jagannibas Panda 5 years, 4 months ago (9733895)

The writer had heard a lot about Miss. Beam's school. Therefore due to curiosity he visited Miss. Beam's school.

Ganesh Kumar 5 years, 4 months ago (9407559)

Ans: The writer had heard a lot about the school so due to curiosity he visited Miss Beam's School.
  • 1 answers

Tanya ?? 5 years, 4 months ago (9516882)

M.Hamel had been a devoted French teacher for 40 years. He was a strict disciplinarian and his students were terrified of him and his 'great ruler'. However, he was a respectable man. On the last day of school, many villagers, who had been taught by him at some point of time, had come to attend his lecture and pay homage to him. He give great importance to learning. French and considered it to be the most beautiful language of the world. However, he was melancholy and depressed that French had been banned from being taught, after France was overtaken by Prussia. His sorrow was evident in the gloomy way he sat in the class while his students were completing their writing assignment. He became nostalgic looking at the classroom and the adjoining garden. Before leaving the class, he broke down and so, could not speak any parting words.
  • 2 answers

Ssk Status 5 years, 4 months ago (8304662)

alu

Manyata Joshi 5 years, 4 months ago (9735624)

The control unit (CU) is a component of a computer's central processing unit (CPU) that directs the operation of the processor. It tells the computer's memory, arithmetic and logic unit and input and output devices how to respond to the instructions that have been sent to the processor

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