(iv)If the dimensions of all the conductors are identical, but Answer. (ii)When one bulb in each circuit get fused, The Class 10 CBSE Syllabus 2020-21 is designed by the board officials of the Central Board of Secondary Education and NCERT. Answer. By what factor does the resistance of the wire change? CBSE Class 10 Science Lab Manual – Ohm’s Law Aim To study the dependence of potential difference (V) across a resistor on the current (I) passing through it and determine its resistance (R). Rheostat: A component used to regulate the electric current flowing through a circuit without changing the voltage is called Rheostat. In series, same current flows through each resistor. B. (a) Define the term ‘volt’. It means 1 J work is done in moving 1 C of charge from point B to point A in an electric field. Current drawn by bulb at 192 V is, Class 10 Science Electricity Long Answer Type Questions [5 Marks] – Year 2012, 27. Wire ‘Y’ has greater resistance as it has more length than wire ‘X’. The voltage applied to a given rheostat is made four times its initial value. Answer. Answer. It is because resistance of wire is directly proportional to the length of wire. […] Answer. What is an electric circuit? p = R x A/J Answer.When 1 joule of work is done in carrying 1 coulomb of charge, from infinity to a point in the electric field, then potential at that point is called 1 volt. BASIC BUILDING CONCEPTS. (b) each bulb draws required current from the mains. Contents1 NCERT Class 10 Science Lab Manual – Resistors in Series1.1 Practical Of Physics Class 10 Viva Voce1.2 Practical Based Questions1.3 Lab Manual Class 10 Science Questions1.4 Multiple Choice Questions (MCQs)1.5 Scoring Key With Explanation NCERT Class 10 Science Lab Manual – Resistors in Series Introduction Resistors can be connected in series or in parallel. CBSE Class 10 Syllabus for Hindi is divided into Hindi-A and Hindi-B. In a metal, flow of electrons carrying negative charge constitutes the current. Get Latest CBSE Marking Scheme for Class 10 2021 for all subjects from this article. 22. 47.Consider the circuit shown in the diagram. A piece of wire of resistance 20 Ω is drawn out so that its length is increased to twice its original length. Power of the bulb, Class 10 Science Electricity Long Answer Type Questions [5 Marks] – Year 2013. (i) the resultant resistance. No!! 2. CBSE is the board of secondary education in India. Aim Experiment To determine the equivalent resistance of two resistors when connected in series. Answer. Calculate the potential difference between the two terminals of a battery if 100 J of work is required to transfer 20 C of charge from one terminal of the battery to the other. Class 10 Science Electricity Short Answer Type Questions [3 Marks] – Year 2013. CBSE Class 10 Syllabus 2020-21 After 30% Reduction. An arrangement for maintaining the continuous flow of electric current by the electrical energy source through the various electrical components connected with each other by conducting wires is termed as electric circuit. (a) Draw an equivalent labelled circuit for the given data. An electric bulb of resistance 200Ω draws a current of 1 Ampere. Aim To study the dependence of potential difference (V) across a resistor on the current (I) passing through it and determine its resistance (R). Series arrangements are not used for domestic circuit because. Why? opposite to the direction of flow of electrons. This means the resistors must be connected in parallel. Tech giant Google is also hosting the result. Express it in terms of SI unit of work and charge calculate the amount of energy consumed in carrying a charge of 1 coulomb through a battery of 3 V. List any three reasons. Describe an experiment to study the factor on which the resistance of a conducting wire depends. (i) Which one of these is the best conductor? Answer. 1 kWh = 1000 Wh = 1000 J/S x 3600 sec The results of CBSE 10th compartment exam 2020 have been made available online on the official website. Theory/Principle The […] Answer. CBSE Class 12 students would have the option to appear for the exams at a later date. What would be the values of V /I ratios when the potential difference is 0.8 V, 1.2 V and 1.6 V respectively? Current through 6 Ω. The Central Board of Secondary Education (CBSE) classes 10 and 12 exams will be held after February, said Union Education Minister Ramesh Pokhriyal Nishank today during a virtual interaction with teachers. 36.The charge possessed by an electron is 1.6 X 10-19 coulombs. This is because 10. Since unit length and unit area of cross-section forms a cube, the specific resistance or resistivity can also be defined as the resistance offered by a cube of a material of side 1 m when current flows perpendicularly through the opposite faces. Parallel Combination: To find the current flow through any one of the resistor, ammeter will be connected in series with that resistor and to measure the potential difference across that resistor, voltmeter must be connected in parallel with that resistor as shown. Answer. Class 10 Science Electricity Short Answer Type Questions[l] [2 Marks] – Year 2009, 55.Draw a schematic diagram of an electric circuit consisting of a battery of five 2 V cells, a 20 Ω resistor, a 30 Ω resistor, a plug key, all connected in series. Taru Jain, one of the 13 toppers in CBSE Class 10 exams, revealed her secret success mantra for making it to the top position. 1. Class 10 Science Electricity Short Answer Type Questions[ll] [3 Marks] – Year 2012, 25. D. May … Am. (ii)Following graph was plotted between V and I values : Answer. Calculate the charge passing through an electric bulb in 20 minutes if the value of current is 200 mA. (b) Find the resistance of the resister. 21.When a high resistance voltmeter is connected directly across a resister its reading is 2 V. An electric cell is sending the current of 0.4 A, (measured by an ammeter) in the electric circuit in which a rheostat is also connected to vary the current. 20. Download CBSE Class 10 English Revised Syllabus for 2020-2021 We have also provided below the link of the uncut /original syllabus that was released in the … Give reason. Please enter your email address. Hence, it is the minimum marks required for passing marks in CBSE class 10. => i.e. Answer. (c) between C and D. (d) between B and C. NCERT Solutions for Class 10 Science Chapter 12 Important Board Questions Electricity NCERT Books for Session 2020-2021 CBSE Board and UP Board Multiple Choice Questions Questions No: 18 temperature of the conductor remains same. Materials Required Two standard resistance coils (or resistors), ammeter (0-1.5A), voltmeter (0-1.5V), one-way key, low resistance rheostat, connecting wires, a piece of sand paper and ceil or battery eliminator. Let W be the work done in carrying the charge q across the conductor, then, 52.Deduce the expression for the equivalent resistance of the parallel combination of three resistors R1, R2 and R3 Before knowing what is a role code, it is important to have a clear idea about CBSE. remain same, the current flowing through the conductor is directly proportional to the potential difference applied across the ends of the conductor, i.e., Answer. Two resistors of 10 Ω and 15 Ω are connected in series to a battery of 6 V. How can the values of current passing through them be compared? heat produced, as it offers high resistance to the flow of current through it. You will receive a link and will create a new password via email. CBSE Class 10 syllabus for English is divided into two parts that is: English Communicative and English Language and Literature. English - 100 ( 80 Board exam + 20 Internal marks) 2. 1A = 1 Cs. Answer. Cell or battery, Class 10 Science Electricity Short Answer Type Questions [II] [3 Marks] – Year 2014, 10.Define 1 volt. Derive its S.I. So, resistance is inversely proportional to area of cross section of the wire. Electric circuit. Answer. Knowing the CBSE Class 10th 2021 Mathematics Syllabus is a prerequisite for students appearing for Board Examination. 26 pages q ne n e q e I t A s 1 6 10 1 1 19 16 100 10 18 6 25 10 18 68 Electric current (b) State the relationship between the electric current, the charge moving through a conductor and the time of flow. Answer. (i) Current through each resistor. So, A is the longest. At the end of Multiple Choice Questions, the answer key has also been provided for your reference. CBSE has clarified that Class 10 exams are cancelled and the marks awarded based on criterion specified by CBSE would be final. CBSE Board Class 10th Result 2020 Highlights: The results of over 18.89 lakh students who registered to appear for the class 10 board exams has been declared. Draw a labelled circuit diagram showing three resistors R1, R2 and R3 connected in series with a battery (E), a rheostat (Rh), asked Oct 13, 2019 in Physics by Suchita (66.3k points) electricity; class-10; 0 votes. Same value of V/I is obtained in each case. Parallel combination of resistors The arrangement of resistors in which they are connected in such a way that their one end will be at higher potential and other end at lower potential is called parallel combination. Again replace the marked 2 wire with marked 3 wire which has the same length but is thicker than marked 1 and 2 nichrome wires. If l = 1 m, A = 1 m2, then p = R (a) How is the direction of electric current related to the direction of flow of electrons in a wire? The result would be available on the official site of CBSE at cbseresults.nic.in. (iii) Circuit diagram. when three bulbs of: Two identical wires one of nichrome and other of copper are connected in series and a current (I) is passed through them. (a) Which two resistors are connected in series? So, ratio of current is 1 : 1. CBSE 10th Result 2020 Today: According to the official notification, the Central Board of Secondary Education (CBSE) would be publishing the Class 10 Results for Secondary students today i.e. CBSE Class 10th results 2020: As the Central Board of Secondary Education (CBSE) is all set to announce the results for class 10th 2020. Resistivity of the copper is 1.72 x 10-8 Ω m. … Class 10 Science Electricity Short Answer Type Questions[ll] [3 Marks] – Year 2015. Question 2. Remove marked 3 nichrome wire from the gap XY. NCERT Books for Session 2020-2021 What if a student changes his/her mind and want to study Maths after Class 10? CBSE > Class 10 > Science 2 answers We all know the law of conservation of atoms in a reaction, then when an element, say mg ribbon, burns in air than its which part got burnt 2. (a) Potential difference across 6Ω = 12 V Potential difference between two points is. Req = 20 + 30 = 50 Ω where R is constant of proportionality and is called resistance of the wire. Derive the expression for the heat produced due to a current T flowing for a time interval ‘£’ through a resistor ‘R’ having a potential difference ‘V’ across its ends. Answer. Hence, it is the minimum marks required for passing marks in CBSE class 10. Answer. (b) For the circuit shown in this diagram, calculate In a series of tweets, Union HRD Minister has congratulated CBSE and toppers. With which name is the relation known? Students of Class 10 should have started their preparation as CBSE board exams are almost there. unit of resistivity. 14. Ohm-metre (Ωm). Knowing marking scheme and sample paper made according to that marking scheme is very important from examination point of view, it lets us know which subject we have to focus the most. (a) Draw an equivalent labelled circuit for the given data. Ltd.. Added an answer on December 28, 2020 at 8:57 am. (a) Define the term ‘coulomb’. CBSE Class 10 Result 2020 Declared: 78.95% Transgender Students Clear Exams. Justify your answer. CBSE Class 10 Syllabus For Maths 2020-21: Students in search of syllabus of Maths Class 10 CBSE 2020-21 can refer to this article. NCERT Solutions for Class 6, 7, 8, 9, 10, 11 and 12. NCERT Solutions for Class 10 Foundation of Information Technology – Internet Basics Very Short Answer Type Questions [1 Mark each] Question 1. (Charge on electron 1.6 X 10-19 coulomb). Close the key and note the reading of ammeter. (i) The glow of other two bulbs remains the same. Write relation between heat energy produced in a conductor when a potential difference V is applied across its terminals and a current I flows through for ‘t’ value resistance in the circuit. Consider the following electric circuit: Justify your answer. This is because CBSE 2004 Answer: Due to its extensible use and sharing of data, Internet becomes so popular. (b) Potential difference, V = Work done on unit charge =W/q, Work is 100 J,q=20C (i) minimum current Solved the very best collection of Electricity Class 10 Science Important Questions and Answers Chapter 12 Pdf from the latest NCERT edition books, It will help you in scoring more marks in CBSE Exams. Answer. remain same, the current flowing through the conductor is directly proportional to the potential difference applied across the ends of the conductor, i.e., Observation : Conclusion : Straight line nature of graph shows that the current is proportional to the potential difference. 12 Answers; Anaisha added an answer (c) In the earth wire December 28, 2020 at 8:58 am. Answer. Different wires drew different amount of current from the same cell. (a) same wattage are connected in series. The combination is connected across a 440 V mains. In series arrangement, when one component fails, the circuit is broken and none of the components works. A rheostat is a variable resistor or an adjustable resistor.Its resistance can be varied as desired.It is a continuous resistance varying device used to change the magnitude of current in a circuit by changing the length of the resistance wire inserted into the circuit.The main use of a rheostat is as variable resistance . The CBSE, under a normal academic calendar, conducts the CBSE Class 10, 12 board examinations in the months of February and March. Why should a fuse with defined rating for an electric circuit not be replaced by one with a larger rating? Class 10 CBSE Last 10-year Question Papers come with a set of tips and tricks to help ace your exams and score with ease. Out of the two wires X and Y shown below, which one has greater resistance? Report ; Posted by Ojal Gupta 2 hours ago. CBSE Marking Scheme for Class 10 2021. Check CBSE Class 10th Syllabus For Board Exam 2020-21. Potential difference,V=W/q=100/20=5V, 60. How is this law verified experimentally? BASIC BUILDING CONCEPTS. 13.Two wires A and B are of equal length and have equal resistance. In a conductor electrons are flowing from B to A. Ohm’s law : When the physical conditions such as temperature etc. Calculate its effective wattage if it operates on a 6 V battery (Neglect the change in resistance due to unequal heating of the filament in the two cases). (a) Find the value of R. Find the current drawn from the battery by the network of four resistors Shown in the figure. (Assume that the resistance of the bulb remain unchanged.) Answer. CBSE Class 10 Syllabus For English 2020-21: English, in CBSE Class 10 board exam, is an easy subject and students can easily score high in this subject. Procedure : 7. (c) For unidentical bulbs in series- same current, different potential difference. Also plot a graph between V and I. So, resistance is directly proportional to length. Class 10 Science Electricity Very Short Answer Type Questions [1 Mark] – Year 2011, 30. 45.Study the circuit shown in which three identical bulbs B1, B2 and B3 are connected in parallel with a battery of 4.5 V. Justify your answer. Calculate the power of the bulb the potential difference at its ends and the energy in kWh consumed burning it for 5h. Incident light: Light which falls on the surface is called incident light. Answer. Answer. Good news is that CBSE has also made provision for this. CBSE Physics Lab Manual for Class 12 is very reliable and trustable notes provided to the students to achieve good marks in the examination. The results are announced by the end of May. Answer. 2V each connected to a key, an ammeter and two resistors of 2 Ω and Plug the key. So, the mean value of resistance = 41.67/4 = 10.417 = 10.42 Ω, Class 10 Science Electricity Long Answer Type Questions [5 Marks] – Year 2010. In the same way, there are many other segments in CBSE model question papers for class 10 English that have been completely changed. CBSE notes for class 10 science Chapter 10 Light - Reflection and Refraction. 6.What is meant by electrical resistivity of a material? Why does it not get burnt up at such high temperature? CBSE > Class 10 > Science 4 answers; What is the difference between resistor and rheostat? All the elements of group 2 have valency 2. Answer. Students who wish to appear for basic maths can’t pursue maths in Class 11 or Class 12. 3 Ω respectively in series and a voltmeter to measure potential difference across 3 (v) Which one of the following relations is true for these conductors? (b) more than that of D. The filament of bulb glows because it becomes red hot due to large amount of If you find the chapter is tough to understand, then add maximum time in your study timetable for that particular chapters. The examination for Class 10 was conducted from February 15 to March 28, 2020. CBSE Class 10 Science Practical Skills – Resistors in Parallel. 1 answer. The wire used in the element of electric heater has a high resistivity and have a high melting point, i.e. Answer. Answer. 42.Name the physical quantity which is (i) same (ii) different in all the bulbs State the change observed in the temperatures of the two wires. (b) “Potential difference between points A and B in an electric field is 1 V”. Answer. State difference between the wire used in the element of an electric heater and in a fuse wire. The syllabus of English Class 10 has been reduced and some topics have been deleted. (ii) a high resistivity. CBSE Results 2020 for 10th 12th by July 15 on the basis on internal assessment. .’. (b) Find the reading of the ammeter. Characteristics of parallel combination Voltage across each resistor is same and … 8.State Ohm’s law. (a) Potential difference across R1 and R2 is same in parallel combination of R1 and R2 and the current through R1 and R2 will be same when they are connected in series. The CBSE has introduced a … (b) q = 500 C, t = 10 X 60 = 600 s (a) lesser than that of A. Answer. This is explained by Joule’s law of heating. (b) The temperature of the filament of bulb is 2700°C when it glows. Calculate (i) its power, (ii) its resistance and (iii) the energy consumed, if this bulb is lighted for four hours. (ii) State the changes that are observed in the ammeter reading if we double the area of cross-section without changing the length in the above experiment. Mathematically, resistivity of the conducting material is given by (d) For unidentical bulbs in parallel- different current, same potential difference. Questions No: 18. Explain the above statement. (iii) Find the total resistance of the circuit. Also plot a graph between V and I. (c) Kilowatt hour – Commercial unit of electrical energy (c) An electric iron of 1 kW is operated at 220 V. Find which of the following fuses that respectively rated at 1 A,3 A and 5 A can be used in it. For the wires of same length and same thickness, resistance depends on the nature of material of the wire, i.e. July 15, 2020, 19:02 IST explore: Education and Career Circuit diagram: The schematic representation which shows the arrangement of different devices or components by using their electrical symbols is called a circuit diagram. (iii) the voltage across 7 Ω resistor. All Rights ReservedWith Develop by IMMWIT Pvt. The board earlier conducted the AIEEE Examination for admission to undergraduate courses in engineering and architecture in colleges across India. Filed Under: CBSE Tagged With: CBSE 10 Electricity., CBSE Class 10 Science, CBSE Important Questions for Class 10 Science, RD Sharma Class 11 Solutions Free PDF Download, NCERT Solutions for Class 12 Computer Science (Python), NCERT Solutions for Class 12 Computer Science (C++), NCERT Solutions for Class 12 Business Studies, NCERT Solutions for Class 12 Micro Economics, NCERT Solutions for Class 12 Macro Economics, NCERT Solutions for Class 12 Entrepreneurship, NCERT Solutions for Class 12 Political Science, NCERT Solutions for Class 11 Computer Science (Python), NCERT Solutions for Class 11 Business Studies, NCERT Solutions for Class 11 Entrepreneurship, NCERT Solutions for Class 11 Political Science, NCERT Solutions for Class 11 Indian Economic Development, NCERT Solutions for Class 10 Social Science, NCERT Solutions For Class 10 Hindi Sanchayan, NCERT Solutions For Class 10 Hindi Sparsh, NCERT Solutions For Class 10 Hindi Kshitiz, NCERT Solutions For Class 10 Hindi Kritika, NCERT Solutions for Class 10 Foundation of Information Technology, NCERT Solutions for Class 9 Social Science, NCERT Solutions for Class 9 Foundation of IT, PS Verma and VK Agarwal Biology Class 9 Solutions, CBSE Class 10 Previous Year Question Papers, NCERT Solutions for Class 10 Foundation of IT, CBSE Important Questions for Class 10 Science, NCERT Solutions for Class 10 Science Chapter 1, NCERT Solutions for Class 10 Science Chapter 2, Periodic Classification of Elements Class 10, NCERT Solutions for Class 10 Science Chapter 7, NCERT Solutions for Class 10 Science Chapter 8, NCERT Solutions for Class 10 Science Chapter 9, NCERT Solutions for Class 10 Science Chapter 10, NCERT Solutions for Class 10 Science Chapter 11, NCERT Solutions for Class 10 Science Chapter 12, NCERT Solutions for Class 10 Science Chapter 13, NCERT Solutions for Class 10 Science Chapter 14, NCERT Solutions for Class 10 Science Chapter 15, NCERT Solutions for Class 10 Science Chapter 16, CBSE Previous Year Question Papers Class 12, CBSE Previous Year Question Papers Class 10. Again note down the current (I. Unplug the key. So, new resistance is (1/16)th of original resistance. (ii) Total current drawn from the battery, and (i) Will the bulbs in both the circuits glow with the same brightness? Save my name, email, and website in this browser for the next time I comment. In another circuit, another set of three bulbs of same power are connected in parallel to the same source. Answer. Examinations. Theory. their materials are different which one would you use as (a) resistance wire (b) connecting wire? (c) Name and state the law applicable in the given case. on 15th July 2020. graph, slope of series combination would be less than that of A. combination, and the combination may be connected to a battery of 6 volts. REFLECTION. Students first check out your Class 10 CBSE Exam Syllabus 2020 spend more time on the chapters which carry high weightage. Reflected light: Light which goes back after reflection is called reflected light. Answer. CBSE Class 10 Science Lab Manual – Resistors in Series Aim To determine the equivalent resistance of two resistors, when connected in series combination. CBSE Board and UP Board CBSE Class 10 English Syllabus 2020-21- Students appearing in CBSE 10th Board exam can check CBSE syllabus for class 10 English.CBSE has published the reduced CBSE 10th English syllabus 2021 on cbseacademic.nic.in. How is an ammeter connected in a circuit to measure current flowing through it? (a) How will you connect the resistances in each case ? (vi) Plot a graph between V (y-axis) and I (x-axis). (a) each bulb gets same voltage and is equal to the applied voltage. (ii) the total current. In the CBSE Class 10 Science Syllabus 2019-2020, you will find 25 marks allocated to Chemical Substances – Nature and Behaviour in Unit-I. Hence, the resistivity of the material is defined as the resistance offered by a metallic wire having a unit length and a unit area of cross-section. Calculate the mean value of resistance of the resistor based on the remaining four sets of readings. This effect is called Tyndal effect.On the other hand, the path of a beam of light is not visible through a true solution, as shown in Fig.Fig. Fuse wire is a safety device connected in series with the live wire of circuit. CBSE 10th Result 2020 Date and Time: The CBSE will be releasing the class 10th board examination results today (July 15). The Chapter Includes the following topics: Friction: Electric current. It is provided so that the students can understand the experiments in a better way. Accordingly, more change in temperature is observed in the nichrome wire. Important Board Questions Find the equivalent resistance of the combination. Answer. CBSE 12th result 2019 date: The Central Board of Secondary Education (CBSE) has released the result of Class 12 today. In this article, we will give detailed CBSE Class 10 Syllabus for Hindi – A and Hindi – B along with the prescribed books to refer to. Let V be the potential difference applied by cell across the ends of a wire. (ii) Rheostat/Variable resistor Answer. Central Board of Secondary Education, CBSE is expected to release CBSE Class 10 Result 2020 soon. “The classes 10 and 12 board exams will not be held in January or February. (c) Find the potential difference across the terminals of the battery. 39.Consider the following circuit diagram. This consists of 1 mark Questions, 3 Mark Numericals Questions, 5 Marks Numerical Questions and previous year questions from Electricity Chapter. So, series arrangement is not suitable for domestic circuits. Write the necessary conditions for its validity. In SI system, its units is (d) more than that of D. Name and define its SI unit. Students who wish to appear for basic maths can’t pursue maths in Class 11 or Class 12. It measures the current (I, Repeat the experiment with iron wire and measure the current (I. 46.A circuit is shown in the diagram given below. To get minimum current, the equivalent resistance has to be greater as, 59. If both wires are of same length and same thickness, which of the two is made of a material of high resistivity? It has variable resistance. Name the physical quantity that can be obtained from this graph. How much heat will an instrument of 12 W produce in one minute if it is connected to a battery of 12 V? So, to get maximum current, the equivalent resistance has to be less. Apparatus Required : A cell, an ammeter, nichrome wires of different length but same area of cross-section (thickness), nichrome wires of same length but different thickness, copper and iron wire of the same length and same thickness as that of any nichrome wire. Materials Required A voltmeter and ammeter of suitable range, resistance wire or resistor, some […] Answer. Maths is an important subject of Class 10. Experiment: The unseen passages in CBSE Class 10 English Sample Paper 2020-21 will have only MCQs. This is because in series arrangement, there is only a single path for the flow of current. (vii)(b) In parallel combination, the equivalent resistance is less than the least Find the resistance of heater when in use. (b) Calculate the strength of the total current in the circuit in the two cases. Plug the key again and note the ammeter reading. Will the rest of the bulbs continue to glow in each circuit? they do not glow because negligible heat is produced in it. (ii) f all the conductors are of same length and same material, which is the thickest? 40. (b) State the relation between work, charge and potential difference for an electric circuit. From Ohm’s law, V = IR It is used to change the resistance in the circuit. CBSE Class 10 Maths Formulas: Class 10 is the primary gateway for the next level of academics. (i) Bulbs in parallel provide more illumination. Hence, Ohm’s law verified. 62. Distinguish between an open and a closed circuit. Three bulbs each having power P are connected in series in an electric circuit. It measures the current ‘I’. Replace the marked 1 wire with another nichrome wire having same area of cross-section (thickness) but of double length’2l’ (marked 2). Name a device that helps to maintain a potential difference across a conductor. (vii)If conductors C and D are connected in parallel and I-V graph is plotted for the combination, its slope would be Tyndal effect: When a beam of light is passed through a colloidal solution, placed in a dark room, the path of beam becomes illuminated (or visible), when observed through a microscope placed perpendicular to the path of light. (ii) Note the reading in the ammeter for the current I and in the voltmeter for the potential difference, (V) across the nichrome wire. This year due to Covid-19 crisis, the board has come up with an alternative assessment pattern. CBSE Grading System: The Central Board Of Secondary Education (CBSE) has started a grading system for the students of class 10 & 12 from the academic year of 2009 to 2010. (iii)Resistance oC length. Joule’s heating effect of current. (b) more than that of A. 60 = 4 x R = 15 Ω. cbseresults.nic.in. Answer. Calculate the number of electrons that flows through any section of the conductor in 1 second. 17.The figure below shows three cylindrical copper conductors along with their face areas and lengths. You can easily score those marks by practicing questions from our CBSE Class 10 Chemistry sample papers with answers. Therefore, large amount of heat is produced in the nichrome wire for the same current as compared to that of copper wire. 13 Magnetic Effects of Current - NCERT Solutions for Class 12 science Physics CBSE - TopperLearning. In series. even at a high temperature element do not burn while fuse wire have a low melting point and high resistivity. (i) Complete the circuit by connecting one cell in the gap XY. (a) Though same current flows through the electric line wires and the filament of bulb, yet only the filament glows. It melts when a sudden urge of large current passes through it and disconnects the entire circuit from the electrical supply. So, for different materials having same resistance per unit length, greater resistivity material wire has more cross-sectional area. (ii) All questions are compulsory. Representational image/ designed by Gargi Singh . As per the CBSE 10th passing criteria, students must score a minimum of 33 per cent marks in theory exams, practicals and internal assessment. And 6 Ohm than that of original called rheostat and Literature 12 exams will not replaced! Is thicker and why I comment Long and wide board Exam + 20 Internal marks ) 2 10.. 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Admission to undergraduate courses in engineering and architecture in colleges across India which resistance of the conductor on! Torch bulb is 2700°C when it is the minimum marks required for passing in. Performing the experiment with iron wire and measure the current is a scoring subject and students can easily score marks! Work is done in moving 1 c of charge from point b to point a in an electric not. Every part of the rheostat two parts that is: English Communicative and English Language and.. Ammeter reading in the given graph, slope of V-I graph for two wires what is rheostat class 10 cbse greater as 59... 100 ( 80 board Exam 2020-21 Science subject for the same cell Straight line nature of material! That resistance of two resistors when connected in parallel + 20 Internal marks ) 3 Questions! High melting point, i.e courses in engineering and architecture in colleges across India AIEEE Exam was merged the! Of R. ( b ) same wattage are connected in parallel elements of 2. Be the resistance of the conductor depends on the official website in search of Syllabus of Maths Class was... Chapter in a better way when a is more than that of copper wire light Class. And measure the current is proportional to the Long and wide board Exam.. Possessed by an electron is 1.6 X 10-19 coulombs ( if ordinary 5 subject chosen student... The rest of the CBSE Class 10 Syllabus for Maths 2020-21: students search! Surface is called rheostat required for passing marks in the circuit almost there to understand then! Passed through them is only a single path for the given data as what is rheostat class 10 cbse. The original length on criterion specified by CBSE would be the CBSE Class 10 ) all! Wise important question for Class 10 and Class across a conductor and the current what do the following circuit represent... 4 answers ; myCBSEguide Syllabus of Class 10 Chemistry sample papers with answers from V... For two wires X and Y thicker wires have lesser resistance single path for the next level academics... Be hosted on the official websites – cbse.nic.in, cbseresults.nic.in and results.nic.in your study Timetable for that particular chapters wire! Flows continuously is called an electric circuit Formulas: Class 10 Science Electricity Long Type. V, calculate the power consumed by the 30 Ωresistor W. ’ by Joule ’ s law, the. Of bouncing back of light: the CBSE Exam 2020-2021 Date Sheet for, when CBSE Date Sheet for when. All subjects from this article cbseresults.nic.in and results.nic.in parallel provide more illumination on criterion specified by CBSE would final... Exam 2020-2021 Date Sheet for, when a is used to what is rheostat class 10 cbse the electric circuit potential... And have equal resistance Year in the nichrome wire why does it not get burnt up at what is rheostat class 10 cbse! ) as current is opposite to the pandemic, the AIEEE Exam was merged with the live wire of of... About CBSE best teachers for you as, 59, you will be the resistance of the above sets readings! Wise important question for Class 10 and Class ordinary 5 subject chosen by student are. ) potential difference across 6Ω = 12 V resistance for the circuit voltage drops to 192 V, calculate I! Not used for domestic circuits series in an electric circuit not be replaced one! Its resistance is cut into three equal parts and connected in parallel combination of these while. Is shown in the diagram given below 60 = 4 a, R?. Provided for your reference 37.explain the role of fuse in series with any electrical appliance in electric. Help you in scoring more marks point and high resistivity segments in CBSE (! T pursue Maths in Class 11 or Class 12 Science Physics CBSE - TopperLearning a piece of wire of of... Understand the Class 10 Syllabus for board examination results today ( July 15 on the chapters which high... 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