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Answered on 02 Jul Tuition Schools/CBSE Schools CBSE/Class 11

Sanjana Singh

Tutor

Scalars are quantities that are fully described by a magnitude (or numerical value) alone. Vectors are quantities that are fully described by both a magnitude and a direction. area is NOT a vector. But it can be "represented" by one. If you are dealing with planar regions in three dimensions, then it... read more
  • Scalars are quantities that are fully described by a magnitude (or numerical value) alone.
  • Vectors are quantities that are fully described by both a magnitude and a direction.
  • area is NOT a vector. But it can be "represented" by one. If you are dealing with planar regions in three dimensions, then it can be convenient to represent the "area" as a vector whose length is the actual scalar area and whose direction is perpendicular to the plane. 

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Asked on 21 May CBSE/Class 6 CBSE/Class 1 CBSE/Class 2 +5 CBSE/Class 5 CBSE/Class 3 CBSE/Class 4 CBSE/Class 11 Schools/CBSE Schools less

How to find the students who need home tuition  or can come at my home  for tuition

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Answered on 11 Jul Tuition Fee Schools/CBSE Schools CBSE/Class 3

Rajee Subramanian

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600rs per month
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Lesson Posted on 11 Apr Exam Coaching CBSE Schools/CBSE Schools

How to Study Theory Subjects for Your Exams

Shilpis Academy

Shilpi Periwal the founder of this Institute has been born and brought up in Kolkata, West Bengal. she...

Most of the students complain that they are not able to study and remember theory subjects well.Three tips for them to deal with this:- Study the theory subjects the first thing in the early morning when your mind is fresh and blank as a paper. Do not try to mug up everything. Just try to understand... read more

Most of the students complain that they are not able to study and remember theory subjects well.

Three tips for them to deal with this:-

  • Study the theory subjects the first thing in the early morning when your mind is fresh and blank as a paper.
  • Do not try to mug up everything. Just try to understand concepts, make diagrams and learn keywords. Try to use those keywords in your own answers.
  • Write and practice the important definitions & formulas.
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Lesson Posted on 05 Apr Schools/CBSE Schools

How to help students to study in a better way?

Toppers Pathshala

Toppers pathshala is leading institute for 8th, 9th ,10th and 11th and 12th computer science. We provides...

How to help students to study in a better way? Nowadays teachers and students had to struggle with how to teach and how to learn. Each teacher has their particular style but then so do most students. The problems develop when teachers and students don’t match. You may have noticed that even your... read more

How to help students to study in a better way?

Nowadays teachers and students had to struggle with how to teach and how to learn. Each teacher has their particular style but then so do most students. The problems develop when teachers and students don’t match. You may have noticed that even your children learn differently than you do cause you to question why they’re not as interested or not “catching on” the same way you did at their age.

How to Help a Failing Student

1. Describe each topic in details and explain the purpose the purpose of the topic

2. Motivate the student

3. Use the technology to explain the subject

4. Focus on performance, not on the score

5. Use new and innovative way for the class

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Lesson Posted on 28 Mar Schools/CBSE Schools CBSE/Class 9/Social Studies/History/The French Revolution

Greek Civilisation

Kaviya

I would like to enhance my skills through teaching and educate young mind for future innovation. moreover....

The civilisation was developed around 800bc when the small villages clustered from city-states. They worshipped Zeus (sky god). Poseidon (sea god), Apollo(sun god), Athena(goddess of victory) etc. In the battle of the marathon (490bc) greeks defeated king Darius I Alexandra was the greatest greek... read more

 

  • The civilisation was developed around 800bc when the small villages clustered from city-states.
  • They worshipped Zeus (sky god).
  • Poseidon (sea god), Apollo(sun god), Athena(goddess of victory) etc.
  • In the battle of the marathon (490bc) greeks defeated king Darius I Alexandra was the greatest greek ruler.
  • The Olympic games originated in Greece. iliad and Odyssey are among the best epics of the world written by homer.
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Lesson Posted on 16 Mar Schools/CBSE Schools CBSE/Class 11 CBSE/Class 11/Commerce/Business Studies +1 Tuition/Class XI-XII Tuition (PUC) less

Global Enterprises at a Glance, MNC and other international forms of business

Educator Titir S

I am a talent consultant with around 9 years into the Human resource industry. My job has been cultivating...

Global Enterprises: These companies have many markets other than their own country market (domestic market) to sell their product. Their products are available nearly all over the world. Why has globalization increased? Globalization refers to the integration of markets in the global economy, leading... read more

Global Enterprises: These companies have many markets other than their own country market (domestic market) to sell their product. Their products are available nearly all over the world.

Why has globalization increased?

Globalization refers to the integration of markets in the global economy, leading to the increased interconnectedness of national economies.  Markets where globalisation is particularly common include financial markets, such as capital markets, money and credit markets, and insurance markets, commodity markets, including markets for oil, coffee, tin, and gold, and product markets, such as markets for motor vehicles and consumer electronics.

Due to:

  • transport and communications
  • rise of global trade through digital
  • capital mobility

Comparisons of Global, MNC, International and transnationals

 

 

 

MNC Organisations:

 

MNC Advantages and defects:

 

Emerging role of MNC and its importance in the Indian economy

When global companies enter emerging markets their costs are cheaper than at home, but if these companies want to operate and hire in a more developed market, the costs are much higher. These factors are considering while companies venture out for MNC’s in other parts of the world.

  • Chinese companies specifically have clear strengths. they can move fast, be flexible and make quick decisions, they lack knowing culture
  • Japan and Korea, has companies successful in selling cars, mobile phones , they think ‘people to people’, not just ‘product to people’
  • Prior to 1991 Multinational companies did not play much role in the Indian economy
  • Industrial policy 1956 stopped private firms to grow in size beyond a point
  • Since 1991 with the advent of industrial policy of liberalization, private foreign capital has been recognized as important for rapid growth of the Indian economy
  • In India, the corporate sector spends only few resources on Research and Development (R&D).
  • It is the giant multinational corporate firms (MNCs) which spend a lot on the development of new technologies
  • Economies are benefited by transferring the new technology developed by MNC countries.

Key poinst to remember here-Factors on whcih MNC has thrived business:

  • Promotion of Foreign Investment:
  • Technology Transfer
  • Promotion of Exports
  • Investment in Infrastructure

 

Reasons for growing importance of Global trade and emergence of Global companies are:

  • Large scale business operations: When we talk about international business we talk about the marketing techniques it uses to grow and expand in the international frontier and ladscape. The manufacturing and production occurs on a large diaspora as the business houses sells goods to local market then expands its reach to the global arena. In this manner the surplus goods are exported.
  • Combined economies : International business integrates (combines) the economies of many countries. Like a product mobile phone will have finance from one country, assembling units from another country , labour from another country, and logistics distribution services from another country. The design and production and further delivery will involve channels of distribution occuring in various market bases. Finally business sells the product in many countries, i.e. in the international market.
  • MNC operations are dominated by developing countries: At present, MNCs from USA, Europe and Japan dominate (fully control) foreign trade. This is because they have large financial and other resources. They also have the best technology and research and development (R & D). They have highly skilled employees and managers because they give very high salaries and other benefits. Therefore, they produce good quality goods and services at low prices. This helps them to capture and dominate the world market.
  • Technology sharing happens: International business gives benefits to all participating countries. the receiving country or one who is developing gets the knowledge transfer when international companies are set up in their local market. The develped and rich countries gets utilisationa and minimal cost of labour and hence operative and production cost reduces. The developing and poor countries in this way get more employment opportunities. All this results in economic development of the developing countries.
  • Competition thrives all along the way of international business: International business has to face keen (too much) competition in the world market. The competition is between unequal partners i.e. developed and developing countries. Sometimes competition arises from the locala markets too due to political pressures and interferences.
  • Importance to Science and Technology: It goes unsaid that International business gives a lot of importance to science and technology. Science and Technology help the business to have large-scale production. Developed countries use high technologies and service goods ina sophisticated manner and also in this manner International business helps them to transfer such top high-end technologies to the developing countries.
  • International trade restriction:Restrcitions in trade are bound to happen when a business or a MNC ventures for international marketing. Many governments do not allow international businesses to enter their countries. Political and environmental trade blocks, tariff barriers, foreign exchange restrictions, etc. all this proe a threat to international business
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Lesson Posted on 06 Mar Schools/CBSE Schools CBSE/Class 9/Science Tuition/BSc Tuition/Mathematical Physics +4 CBSE/Class 8/Science/Light Tuition/Class IX-X Tuition Tuition/Class VI-VIII Tuition Tuition/Class VI-VIII Tuition/Science less

Reflection Of Light (Questions)

Soumi Roy

I am an experienced, qualified tutor with over 5 years of experience in teaching maths and physics across...

Reflection of Light Rays on a Reflecting Surface: When a light ray strikes a surface separating two media with different optical properties, part of the light energy is reflected back to the media where it coming from. When light strikes a perfectly reflecting surface, such a mirror for example, all... read more

Reflection of Light Rays on a Reflecting Surface:

When a light ray strikes a surface separating two media with different optical properties, part of the light energy is reflected back to the media where it coming from. When light strikes a perfectly reflecting surface, such a mirror for example, all the light energy is reflected.
We first look at the vocabulary used to describe the reflection of light.

The surface separating the two media is called the interface or boundary.
The point at which the incident ray strikes the interface is called the point of incidence.
i is the angle made by the incident ray and the normal to the interface and is called the angle of incidence.
r is the angle made by the reflected ray and the normal to the interface and is called the angle of reflection.

Laws of reflection:

(1) The incident light ray, the reflected light ray and the normal to the interface at the point of incidence make a plane called the plane of incidence

(2) The angle of incidence and the angle of reflection have the same size.

Example 1: A light ray strikes a reflective plane surface at an angle of 56° with the surface.

a) Find the angle of incidence.

b) Find the angle of reflection.

c) Find the angle made by the reflected ray and the surface.

d) Find the angle made by the incident and reflected rays.

Example 2: A ray of light is reflected by two parallel mirrors (1) and (2) at points A and B. The ray makes an angle of 25° with the axis of the two mirrors.

a) What is the angle of reflection at the point of incidence A?

b) What is the angle of reflection at the point of incidence B?

c) If the distance between the two mirrors id d = 4 cm and the length L of the two mirror system is 3 meters, approximately how many reflections take place between the two mirrors?

d) In a real system, at each reflection, there are losses of the light energy travelling between the two mirrors. If L and d are fixed, what can be done to decrease the number of reflections on the mirrors and hence the energy lost by reflection?

Solution:

a) i = 90 - 25 = 75 °

b) the two mirrors are parallel and AB intersect both of them, hence angle r and i' are alternate interior and therefore equal in size. Also r = i (law of reflection). Hence i' = r = i = 75 °

c) If the distance between the two mirrors id d = 4 cm, AC can be calculated as follows
tan(75°) = AC / d = AC / 4
AC = 4 tan(75°) = 15 cm
The number of reflections N that will take place between the two mirrors may be approximated as follows.
N = L / AC = 3 m / 15 cm = 20

d) Let the angle made by the light ray and the axis of the two mirror system be ? instead of 25 °.
The angle of incidence i = 90 - ? = r = i'
tan(i') = tan( 90 - ?) = cot (?) = AC / d
AC = d cot(?)
number of reflections = N = L / AC = L / d cot(?)
If L and d are fixed, the only way to decrease N is to increase cot(?) and hence decrease ?.

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Lesson Posted on 11 Jan CBSE/Class 11 CBSE/Class 12 Schools/CBSE Schools

Mathematics: Trigonometric

Amar Singh

I have good experience.

1. ( sinA )2 + (cosA)2 = 1 2. (tanA)2 + (cotA)2 = 1 3. SinA = 1 /cosecA 4. CosA = 1 /secA 5. TanA = 1/cotA (also inverse as secA= 1/ CosA) 6. sin2a = 2 sinA CosA 7. cos2a = (cosa)2 - (sina)2 = 2(cosa)2 - 1 = 1 - 2 (sina)2 8. tan2a = 2tana / 1- (Tana... read more

1. ( sinA )2 + (cosA)2 = 1    

2. (tanA)2 + (cotA)2 = 1   

3. SinA =   1 /cosecA  

4. CosA =  1 /secA

5. TanA = 1/cotA (also inverse as secA= 1/ CosA)

6. sin2a = 2 sinA CosA

7. cos2a = (cosa)2 - (sina)2

               = 2(cosa)2 - 1

               = 1 - 2 (sina)2

8. tan2a =  2tana / 1- (Tana)2.

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Lesson Posted on 20/11/2017 Schools/CBSE Schools

How to Study Maths: 7 Tips for Solving Maths Problems

Rupam Sasmal

I am an experienced, qualified teacher and tutor with over 10 years of experience in teaching Maths,...

Maths is one of those subjects which you can easily spend hours studying but end up none the wiser. However much you have studied, if you can not solve the problem on day of the test, you are lost. Thankfully, there are some techniques for studying maths that you can do regardless of your level. 7... read more

Maths is one of those subjects which you can easily spend hours studying but end up none the wiser. However much you have studied, if you can not solve the problem on day of the test, you are lost. Thankfully, there are some techniques for studying maths that you can do regardless of your level.

 

7 Tips for Maths Problem Solving:

1. Practice, Practice & More Practice:

It is impossible to study maths properly by just reading and listening. To study maths you have to roll up your sleeves and actually solve some problems. The more you practice answering maths problems, the better. Each problem has its own characteristics and it’s important to have solved it in numerous ways before tackling the exam. There is no escaping this reality, to do well in a Maths exam you need to have solved a LOT of mathematical problems beforehand.

2. Review Errors:

When you’re practising with these problems, it’s important to work through the process for each solution. If you have made any mistakes, you should review them and understand where your problem-solving skills let you down. Understanding how you approached the problem and where you went wrong is a great way of becoming stronger and avoiding the same mistakes in the future.

 

3. Master the Key Concepts:

Do not try to memorise the processes. This is counter-productive. It is much better and rewarding in the long-run to focus on understanding the process and logic that is involved. This will help you understand how you should approach such problems in the future.

Remember that Maths is a sequential subject so it’s important to have a firm understanding of the key concepts that underpin a mathematical topic before moving on to work on other, more complex solutions which are based on understanding the basics.

4. Understand your Doubts:

Sometimes you can get stuck trying to solve part of a maths problem and find it difficult to move on to the next stage. It’s common for many students to skip this question and continue on to the next. You should avoid doing this and instead spend time trying to understand the process of solving the problem. Once you have grasped an understanding of the initial problem, you can use this as a stepping stone to progress to the remainder of the question.

 

5. Create a Distraction Free Study Environment:

Mathematics is a subject that requires more concentration than any other. A proper study environment and a distraction free area could be the determining factor when solving complex equations or problems in geometry, algebra or trigonometry!

Studying with music can help create a relaxing atmosphere and stimulate the flow of information. Having suitable background music can foster an environment of maximum concentration. Of course, you should steer clear of Pitbull and Eminem, instrumental music is the best thing in these times.

6. Create a Mathematical Dictionary:

Mathematics has specific terminology with a lot of vocabulary. We suggest you create Notes or Flashcards with all the concepts, terminology and definitions you need to know. You should include their meanings, some key points and even some sample answers so you can consult them at any time and recap.

7. Apply Maths to Real World Problems:

As much as possible, try to apply real-world problems when approaching maths. Maths can be very abstract sometimes so looking for a practical application can help change your perspective and assimilate ideas differently.

Probability, for example, can be used in everyday life to predict the outcome of something happening and determine whether you want to take a risk such as if you should buy a lottery ticket or gamble.

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