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NCERT Solutions for class 10 Maths Chapter 2 Exercise in PDF

These solutions will help you revise the whole soution and score well in the board exams. We are providing soluion step-by-step solutions to all the exercise class 10th ncert 2.3 solution value which are class 10th ncert 2.3 solution value per the NCERT textbook. 10hh these problems will help you have a better understanding of the chapter and will improve your confidence. Download � Algebra Formulas for Class You can find the solved exercises for 10th Maths Chapter 3.

The solution of such equations is a pair of values for x and y which makes both sides of the equation equal.

There are two variables in this slution, x and y. In simple words, every solution of the equation is a point on the line representing it.

This chapter consists of seven exercises with the last exercise including an optional exercise. By the end of valuw 3, you will learn to solve pair of linear equations by graphical method which will be solved on graph sheets and algebraic method using three methods. Lastly, you will also be able to solve the equations which are reducible to a pair of linear equations.

The chapter has plenty of examples and exercise questions. Go through the step-by-step solutions Class 10th Ncert 2.3 Solution Treatment and practice well in order to make the best use of it.

10rh and solve the problems on your own and refer to the solutions only if you get stuck in. This will help you to learn the methods to solve the questions which can be extended further by practicing other questions.

With the help of this soluton, you can strengthen your conceptual knowledge and test-taking skills. So, utilize the solutions, books, practice questions, and mock tests by Embibe and boost your scores. If you have any questions, feel free to post it in ssolution comment box below and we will get back to you at the earliest. Stay tuned on embibe. Support: support embibe.

General: info embibe. With the help solktion these solutions, students can learn the correct method of answering questions in the exams.

These solutions can be used as a quick class 10th ncert 2.3 solution value material before a test or an exam. These lines are parallel to each other on the graph. No solution. The lines will intersect at - 4, � 5. You are given two numbers which are in the ratio Find the numbers if the ratio becomes after subtracting 8 from each of the numbers. The numbers are 40 and The graph of the given equation will be parallel to the y-axis. The present age of the father is 36 and the age of the son is 6.

Pair of Linear Equations in Two Variables. Substitution Method. Elimination Method. Cross-Multiplication Method.

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Any point which lies on one line also lies on the other. We can assume any random values for y and can find the corresponding value of x using the above equation. All such points will lie on both lines and there will be infinite number of such points.

Plotting these points on the graph, it is clear that both lines are parallel. So the two lines have no common point. Hence the given equations have no solution and lines are inconsistent. We can clearly see that lines are intersecting at 2, 2 which is the solution. We get. Two lines intersect with each other if. Two lines are parallel to each other if. Find the 29th term.

If the 3rd and the 9th term of an AP are 4 and -8 respectively, which term of this AP is zero? The 17th term of an AP exceeds its 10th term by 7.

Find the common difference. Which term of the AP: 3, 15, 27, 39, � will be more than its 54th term? Two APs have the same common difference.

The difference between their th terms is , what is the difference between their th terms? How many three-digit numbers are divisible by 7?

How many multiples of 4 lie between 10 and ? Electricity class 10 NCERT solutions will not only help in board exam preparation but also helps in clearing the competitive exams like Engineering. Also, candidates can find electricity class 10 numericals with solutions which helps candidates solving their assignments.

Question 1 What does an electric circuit mean? Answer: A continuous and closed path along which an electric current flows is called an electric circuit. Question 2 Define the unit of current. Answer: Unit of current is ampere. If one coulomb of charge flows through any section of a conductor in one second then the current through it is said to be one ampere.

Question 3 Calculate the number of electrons constituting one coulomb of charge. Question 1 Name a device that helps to maintain a potential difference across a conductor. Answer: A battery. Question 2 What is meant by saying that the potential difference between two points is IV?

Answer: The potential difference between two points is said to be 1 volt if 1 joule of work is done in moving 1 coulomb of electric charge from one point to the other. Question 3 How much energy is given to each coulomb of charge passing through a 6 V battery? Question 1 On what factors does the resistance of a conductor depend? OR List the factors on which the resistance of a conductor in the shape of a wire depends.

Question 2 Will current flow more easily through a thick wire or a thin wire of the same material, when connected to the same source? Answer: The current will flow more easily through a thick wire than a thin wire of the same material.

Larger the area of cross-section of a conductor, more is the ease with which the electrons can move through the conductor. Therefore, smaller is the resistance of the conductor. Question 3 Let the resistance of an electrical component remains constant while the potential difference across the two ends of the component decreases to half of its former value. What change will occur in the current through it?

Answer: When potential difference is halved, the current through the component also decreases to half of its initial value. Question 4 Why are coils of electric toasters and electric irons are made of an-alloy rather than a pure metal?

OR Why are alloys commonly used in electric heating devices? Given reason. Question 5 Use the data in Table Thus iron is a better conductor because it has lower resistivity than mercury. Answer: The required circuit diagram is shown below :. What would be the readings in the ammeter and the voltmeter? Solution: The required circuit diagram is shown on the right. Answer: When the resistances are connected in parallel, the equivalent resistance is smaller than the smallest individual resistance.

What is the resistance of an electric iron connected to the same source that takes as much current as all three appliances, and what is the current through it? Question Class 10th Ncert 2.3 Solution For 3 What are the advantages of connecting electrical devices in parallel with the battery instead of connecting them in series?

Answer: Advantages of connecting electrical devices in parallel with the battery are :. Solution: i Highest resistance can be obtained by connecting the four coils in series. Question 1 Why does the cord of an electric heater not glow while the heating element does? Solution: Heat generated in a circuit is given by I 2 R t. The heating element of an electric heater made of nichrome glows because it becomes red-hot due to the large amount of heat produced on passing current because of its high resistance, but the cord of the electric heater made of copper does not glow because negligible heat is produced in it by passing current because of its extremely low resistance.

Question 2 Compute the heat generated while transferring coulomb of charge in one hour through a potential difference of 50 V. Calculate the heat developed in 30 s. Question 1 What determines the rate at which energy is delivered by a current? Answer: Resistance of the circuit determines the rate at which energy is delivered by a current. Question 2 An electric motor takes 5 A from a V line. Determine the power of the motor and the energy consumed in 2 h.

Question 1 A piece of wire of resistance R is cut into five equal parts. These parts are then connected in parallel. Question 2 Which of the following terms does not represent electrical power in a circuit?

Question 3 An electric bulb is rated V and W. Question 4 Two conducting wires of the same material and of equal lengths and equal diameters are first connected in series and then parallel in a circuit across the same potential difference. The ratio of heat produced in series and parallel combinations would be : a 1 : 2 b 2 : 1 c 1 : 4 d 4 : 1 Answer: c 1 : 4. Question 5 How is a voltmeter connected in the circuit to measure the potential difference between two points?

Answer: A voltmeter is connected in parallel to measure the potential difference between two points. Question 6 A copper wire has diameter 0. How much does the resistance change if the diameter is doubled? Answer: If a wire of diameter doubled to it is taken, then area of cross-section becomes four times.

Question 7 The values of current I flowing in a given resistor for the corresponding values of potential difference V across the resistor are given below : Plot a graph between V and I and calculate the resistance of the resistor.

Solution: The graph between V and I for the above data is given below. The slope of the graph will give the value of resistance. Let us consider two points P and Q on the graph. Question 8 When Ncert Solutions Class 10th Chapter 8 Value a 12 V battery is connected across an unknown resistor, there is a current of 2.

Find the value of the resistance of the resistor. Question 9 A battery of 9V is connected in series with resistors of 0. How much current would flow through the 12 Q resistor? Thus 4 resistors are needed to be connect. The equivalent resistance is. Question 12 Several electric bulbs designed to be used on a V electric supply line, are rated 10 W. How many lamps can be connected in parallel with each other across the two wires of V line if the maximum allowable current is 5 A?

What are the currents in the three cases? Solution: i When the two coils A and B are used separately. Solution: i The circuit diagram is shown in figure.

Question 15 Two lamps, one rated W at V, and the other 60 W at V, are connected in parallel to electric mains supply. What current is drawn from the line if the supply voltage is V? Calculate the rate at which heat is developed in the heater. Question 18 Explain the following: i Why is tungsten used almost exclusively for Ncert Solutions Class 10th Kartoos Value filament of electric lamps? If the area of cross section of a conductor of fixed length is increased, then resistance decreases because there are more free electrons for movement in conductor.

So, they do not become too hot on passing electric current. Electric current, potential difference and electric current, Ohms law, Resistance, Resistivity factors on which the resistance of a conductor depends; Series combination of resistors, parallel combination of resistors; and its application on daily life; Heating effect of Electric current, electric Power, Interrelation between P, V, and R.

Formulae Handbook for Class 10 Maths and Science.

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