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Physics Class 10 Electricity Notes & NCERT Solutions - Leverage Edu With our NCERT textbook solutions for CBSE Class 10 Physics, you will develop an interest in learning Physics instead of mugging up answers. Our Physics experts provide concept insights along with the NCERT textbook Ncert Solutions Class 10th Physics Chapter Light Key solutions. NCERT Solutions for class 10 Science - Product of Class of Achievers on Acids Bases and Salts Class 10; NCERT Solutions for class 10 Science - Product of Class of Achievers on Chemical Reaction and Equation Class 10; ?????? ??? ????? / sansadhan evam vikas class .
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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.

Answer: Hence, the current through an electrical component also becomes half of its previous value. Question 4: Why are Ncert Solutions Class 10th Physics Electricity Department the coils of electric toasters and electric irons made of an alloy rather than a pure metal Answer: The coils of electric toaster and electric iron are made of an alloy rather than a pure metal because of the following reasons; i The resistivity of an alloy is higher than that of a pure metal.

Question 5: Use the data in Table Question 2: Redraw the circuit of the above question, putting in an ammeter to measure the current through the resistors and a voltmeter to measure the voltage across the 12 resistor.

What would Ncert Solutions Class 10th Physics Electricity Email be the reading in the ammeter and the voltmeter? Question 1: Judge the equivalent resistance when the following are connected in parallel. 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 flows through it?

Question 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:. Answer: a The highest resistance is secured by combining all four coils of resistance in series.

Question 1: Why does the cord of an electric heater not glow while the heating element does? Answer: The cord of an electric heater is made up of metallic wire such as copper or aluminum which has low resistance while the heating element is made up of an alloy which has more resistance than its constituent metals. Question 2: Compute the heat generated while transferring C of charge in one hour through a potential difference of 50 V. Question 3: An electric iron of resistance 20 Q takes a current of 5 A.

Question 1: What determines the rate at which energy is delivered by a current? Answer: Electric power determines the rate at which energy is delivered by a current. Question 2: An electric motor takes 5 A from a V line. Question 1: A piece of wire of resistance R is cut into five equal parts. 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 same material and of equal lengths and 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 b c d Answer:. Question 5: How is a voltmeter connected in the circuit to measure the potential difference between two points?

Question 6: A copper wire has a diameter 0. Question 7: The values of the 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 that resistor. Question 8: When a 12 V battery is connected across an unknown resistor, there is a current of 2.

Question 9: A battery of 9 V is connected in series with resistors of 0. Answer: Since all the resistors are in series, the same current, 0. Question Several electric bulbs designed to be used on a V electric supply line, are rated 10 W. Question A hot plate of an electric oven connected to V line has two resistance coils A and B, each of 24 Q resistance, which may be used separately, in series, or in parallel. Question Two lamps, one rated W at V, and the other 60 W at V, are connected in parallel to electric mains supply.

Question An electric heater of resistance 8 f2 draws 15 A from the service mains 2 hours. Question Explain the following. Answer: a It has high melting point and emits light at a high temperature. Each of them dissipates energy and can withstand a maximum power of 18 W without melting. Find the maximum current that can flow through the three resistors.

Question 2: Should the resistance of an ammeter be low or high? Give reason. Answer: The resistance of an ammeter should be low so that it will not disturb the magnitude of current flowing through the circuit when connected in series in a circuit.

Question 3: How does use of a fuse wire protect electrical appliances? Answer: The fuse wire is always connected in series with the live wire or electrical devices. If the flow of current exceeds the specified preset value due to some reason, the heat produced melts it and disconnects the circuit or the device from the mains.

In this way, fuse wire protects the electrical appliances. Question 4: What is electrical resistivity? In a series electrical circuit comprising a resistor made up of a metallic wire, the ammeter reads 5 A. The reading of the ammeter decreases to half when the length of the wire is doubled. Answer: The resistance offered by a metallic wire of unit length and unit cross-sectional area is called electrical resistivity. Hence, when the length of wire is doubled, the resistance becomes double and current decreases to half.

Calculate the resistance of the electric lamp. Question 6: Why is parallel arrangement used in domestic wiring? Answer: Parallel arrangement is used in domestic wiring because i Each appliance gets the same voltage as that of the mains supply.

Question 7: B 1, B 2 and B 3 are three identical bulbs connected as shown in figure. When all the three bulbs glow, a current of 3A is recorded by the ammeter A. Answer: i Since B 1 ,B 2 and B 3 are in parallel, the potential difference across each of them will remain same. So when the bulb B 1 gets fused, B 2 and B 3 have the same potential and continues with the same energy dissipated per second, i. Question 1: Three incandescent bulbs of W each are connected in series in an electric circuit.

In another circuit, another set of three bulbs of the same wattage are connected in parallel to the same source. Justify your answer. Will the rest of the bulbs continue to glow in each circuit? Answer: a The bulbs in the two circuits will not glow equally bright as the current through them is not the same. While the rest of bulbs in parallel circuit will continue to glow without getting disturbed because in parallel combination, current gets additional paths to flow.

Question 2: Find out the following in the electric circuit given in figure: Answer: e No difference, since the ammeters are connected in series and same current will pass through them, so reading of both ammeters will be same. Question 1. To determine the equivalent resistance of two resistors when connected in series, a student arranged the circuit components as shown in the diagram.

But he did not succeed to achieve the objective. Question 2. For the given circuit, name the components which are connected in parallel. Because terminals of the resistance and voltmeter are connected together.

Question 3. A student arranges the following circuit to get equivalent resistance of a series combination of two resistors R 1 and R 2.

Which one of the following statements will be true for this circuit [CCE ] a It gives incorrect reading for current I as well as potential difference V b It gives correct reading for current I but incorrect reading for potential difference V c It gives correct reading for potential difference V but incorrect reading for current I d It gives correct reading for both I and V Answer: b The voltmeter should be connected across the components of and R 2 to give correct reading for potential difference.

Question 4. An ammeter has 20 divisions between 0 mark and 2A mark on its scale. The least count of ammeter is a 0. Question 5. A student finds that there are 20 divisions between zero mark and 1V mark of a voltmeter. The least count of voltmeter is a 0. Circuit diagrams are important to represent any electrical circuit. In this segment, the students will learn about the different symbols used to prepare a circuit diagram.

This segment includes several diagrams and schematics to elaborate on the details. Another important concept in Class 10 Science Chapter Electricity is resistance.

The solution set for 10th Science Chapter 12 explains resistance and its related concepts in detail. The different resistances for different metals have been included. The factors affecting the resistance of a material is also discussed with proper mathematical formulas. The concept of resistors and their combinations are also considered in this solution set. The creators of these notes have included several diagrams to explain the ideas. The mathematical formula associated with it and the application of such laws are also being described elaborately.

The solution set has been oriented towards exam preparation, and therefore, it also contains several solved examples. These solved mathematical problems are the perfect representation of tough questions that are generally encountered in the examinations.

The students can practice these examples and the unsolved questions provided at the end of this segment if they wish to prepare well for their examinations. In the next segment, the heating effect of electric current is discussed in detail. All these formulas are also included in the solution set for Science Chapter 12 Class The students must practice these solutions hard so that they can get a grasp over the subject. Along with the details, the solution set for Science Class 10 Chapter 12 also covers the application of such heating effects.

The students will learn about real-world applications, which are often referred to during most examinations. The final concept covered in this solution set is electric power. Before learning about electric power, it is important to understand the individual concepts covered above. The current flowing through a conductor is said to be 1A, if a charge of 1 coulomb C flows through it in 1 second s.

Name a device that helps to maintain a potential difference across a conductor. Electric cell or A battery is a device that helps to maintain a potential difference across a conductor. What is meant by saying that the potential difference between two points is 1V?

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. How much energy is given to each coulomb of charge passing through a 6 V battery? Will current flow more easily through a thick wire or thin wire of the same material, when connected to the same source? 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? Why are the coils of electric toasters and electric irons made of an alloy rather than a pure metal? The coils of electric toaster and electric iron are made of an alloy rather than a pure metal because of the following reasons:. Redraw the circuit of the above question, putting in an ammeter to measure the current through the resistors and a voltmeter to measure the voltage across the 12 resistor. What would be the reading in the ammeter and the voltmeter?

Since all the three resistors are connected in series, so, the equivalent resistance R is equal to the sum of all resistance. Judge the equivalent resistance when the following are connected in parallel:. 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 flows through it? What are the advantages of connecting electrical devices in parallel with the battery instead of connecting them in series?

Following are the advantages of connecting electrical devices in parallel with the battery:. Parallel circuits device the current among the electrical devices so that they can help necessary amount of current to operate properly. Why does the cord of an electric heater not glow while the heating element does? The resistance of the cord of an electric heater is low compared to the heating element.

The heating element of the heater is made up of an alloy, which has more resistance than its constituent metals. So, It becomes too hot and Glow red. Compute the heat generated while transferring C of charge in one hour through a potential difference of 50 V. An electric iron of resistance 20 Q takes a current of 5 A.

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