What is the resistance across a diagonal of the square? (c) What is the commercial unit of electric energy? 41.Series arrangements are not used for domestic circuits. (ii) If the wattage of each bulb is 1.5 W, how much reading will the ammeter A show when all the three bulbs glow simultaneously? (a) Define electric power. 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 29. Calculate (i) its power, (ii) its resistance and (iii) the energy consumed, if this bulb is lighted for four hours. Since current varies linearly with potential difference, the graph between V and I will be a linear in nature as shown, Class 10 Science Electricity Short Answer Type Questions[l] [2 Marks] – Year 2012. 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? It means 1 J work is done in moving 1 C of charge from point B to point A in an electric field. Potential difference,V=W/q=100/20=5V, 60. It is used to change the resistance in the circuit. Answer. (c) Kilowatt hour – Commercial unit of electrical energy 2. (ii) the total current. So, it is very important to understand the class 10 English question paper 2020-21 pattern and prepare for exams accordingly. CBSE Class 10 Science Lab Manual – Ohm’s Law. (ii) Rheostat/Variable resistor Download CBSE Class 10 Science Extra Questions Answers for Chapter 1 Chemical Reactions and Equations in PDF. Ltd.. Added an answer on December 28, 2020 at 8:57 am. (c) between C and D. (d) between B and C. Multiple Choice Questions Calculate the charge passing through an electric bulb in 20 minutes if the value of current is 200 mA. It has variable resistance. (v) Option (a) is correct. 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. Answer. The board earlier conducted the AIEEE Examination for admission to undergraduate courses in engineering and architecture in colleges across India. (i) a very high melting point (of 3380°C) and ... CBSE Class 10 Science Practicals Lab Manual MCQ Аnswers: Physics Lab Manual CBSE Class 10 Scoring Key With Explanation (b) Ammeter measures current. in first case. Justify your answer in both the cases. BASIC BUILDING CONCEPTS. 3.Study the following electric circuit and find (i) the current flowing in the circuit and (ii) the potential difference across 10 Ω resistor. 18.Find the current flowing through the following electric circuit. A fuse wire is inserted in which wire? Wire ‘Y’ has greater resistance as it has more length than wire ‘X’. CBSE conducts the final examinations for Class 10 and Class 12 every year in the month of March. 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. 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. Connect the cell, an ammeter and plug key in series with nichrome wire of length T (marked 1) in the gap XY as shown. Good news is that CBSE has also made provision for this. Electricity List any three reasons. What will be the nature of graph between potential difference and current for a conductor? Students who wish to appear for basic maths can’t pursue maths in Class 11 or Class 12. Discuss in which geometrical shape the resistance will be highest. Answer. At the end of Multiple Choice Questions, the answer key has also been provided for your reference. Second observation shows that thicker wires have lesser resistance. Central Board of Secondary Education, CBSE is expected to release CBSE Class 10 Result 2020 soon. Maths is an important subject of Class 10. Answer. Before knowing what is a role code, it is important to have a clear idea about CBSE. 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. Describe an experiment to study the factor on which the resistance of a conducting wire depends. .’. Give justification for your answer. Greater than slope of V-I graph, greater will be the resistance of given metallic wire. Calculate the resistance of the wire in the new Situation. 12.Draw a labelled circuit diagram showing three resistors R1, R2 and R3 connected in series with a battery (E), a rheostat (Rh), a plug key (K) and an ammeter (A) using standard circuit symbol. temperature of the conductor remains same. B. Accordingly, more change in temperature is observed in the nichrome wire. A. Report ; Posted by Ojal Gupta 2 hours ago. Current through 6 Ω. Justify your answer. What is meant by electric current? 56. CBSE Class 10 Syllabus for Hindi is divided into Hindi-A and Hindi-B. (a) Conventional direction of electric current is opposite to the direction of flow of electrons in a wire. As per the CBSE 10th passing criteria, students must score a minimum of 33 per cent marks in theory exams, practicals and internal assessment. (a) same wattage are connected in series. Class 10 Science Electricity Short Answer Type Questions[ll] [3 Marks] – Year 2012, 25. Am. All electrical appliances work at a constant voltage. CBSE Class 10, 12 exams will be held post February. (b) more than that of A. Answer. CBSE Class 10 Science Lab Manual – Resistors in Series Aim To determine the equivalent resistance of two resistors, when connected in series combination. (b) Find the reading of the ammeter. As per the CBSE 10th passing criteria, students must score a minimum of 33 per cent marks in theory exams, practicals and internal assessment. A given length of a wire is doubled on itself and this process is repeated once again. C. In the earth wire. circuit. (b) Find the resistance of the resister. CBSE 10th Result 2020 Date and Time: The CBSE will be releasing the class 10th board examination results today (July 15). This is explained by Joule’s law of heating. Trusted by 1 Crore+ Students. July 15, 2020, 19:02 IST explore: Education and Career (a) Increase the magnitude of current only, (b) Decrease the magnitude of current only, (c) Increase or decrease the magnitude of current, NCERT Solutions for Class 10 Science Chapter 12 Check CBSE Class 10th Syllabus For Board Exam 2020-21. Fuse wire is a safety device connected in series with the live wire of circuit. 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. This approach will enable you to plan your studies as per the sequence of the topics in your syllabus. Will the rest of the bulbs continue to glow in each circuit? (iii)Resistance oC length. graph, slope of series combination would be less than that of A. Answer. Potential difference between two points is. 10. CBSE Class 10 Science – More Resources. The purpose of a rheostat is: 1; Poll Results. From Ohm’s law, V = IR In the given graph, wire A has greater slope then B. 3. Three bulbs each having power P are connected in series in an electric circuit. Tarun Jain belongs to St. Angela Sophia Sr Secondary School in Jaipur. Use this circuit to show that the same current flows through every part of the circuit. How is an ammeter connected in a circuit to measure current flowing through it? on 15th July 2020. Direction of flow of electrons gives the direction of electronic current by convention, the direction of flow of positive charge is taken as the direction of conventional current. Theory/Principle The […] Give justification for your answer. How much heat will an instrument of 12 W produce in one minute if it is connected to a battery of 12 V? Check the new CBSE Syllabus of Class 10 Social Science subject for the academic session 2020-2021. 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. (b) It means, the maximum current will flow through it is only 2 A. Fuse wire will melt if the current exceeds 2 A value through it. Like every year, the CBSE Results will be published online on the official website of the board i.e. CBSE Class 10, 12 exams will be held post February. BASIC BUILDING CONCEPTS. 40. 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? CBSE is the board of secondary education in India. Consider the following parallel circuit shown below: Let I1, I2 and I3 be the current flow through the resistor R1, R2 and R3 connected in parallel. Types of electricity. Lost your password? 33.A 9Ω resistance is cut into three equal parts and connected in parallel. List two precautions you would observe while performing the experiment. The unseen passages in CBSE Class 10 English Sample Paper 2020-21 will have only MCQs. Justify your answer. (i) Will the bulbs in both the circuits glow with the same brightness? Answer. In CBSE Class 10 Exam, Less Than 10% Students Score 90 And Above Tamil Nadu On Top In CBSE 10th Result 2020, Delhi In Bottom Three CBSE 10th … p = R x A/J Class 10 Science Electricity Very Short Answer Type Question [1 Mark] – Year 2014, 9. CBSE Marking Scheme for Class 10 2021. I = 500/600 = 5/6A, Class 10 Science Electricity Long Answer Type Question [5 Marks] – Year 2009. So, series arrangement is not suitable for domestic circuits. Answer. 8.State Ohm’s law. The combination is connected across a 440 V mains. Can a student study Maths after Class 10 if he/she opt for Basic Maths? Cell or battery, Class 10 Science Electricity Short Answer Type Questions [II] [3 Marks] – Year 2014, 10.Define 1 volt. CBSE Class 12 students would have the option to appear for the exams at a later date. In series: Rest of the bulbs will not glow. 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. Which one of the above sets of readings can be rejected? 43. The results are announced by the end of May. (d) For unidentical bulbs in parallel- different current, same potential difference. You will receive a link and will create a new password via email. 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. 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. Types of substances depending upon their ability to conduct current . The results of CBSE 10th compartment exam 2020 have been made available online on the official website. So, resistance is directly proportional to length. 46.A circuit is shown in the diagram given below. Otherwise, they might miss out on certain chapters and topics. Answer. Answer. But in series circuit, the current is constant throughout the electric circuit and potential is different across the different components. Answer. (c) Name and state the law applicable in the given case. 37.Explain the role of fuse in series with any electrical appliance in an electric circuit. State the change observed in the temperatures of the two wires. Answer. (vi)(a) In series, resistances are added. Calculate the amount of charge flowing through the (b) “Potential difference between points A and B in an electric field is 1 V”. (c) For unidentical bulbs in series- same current, different potential difference. It measures the current (I, Repeat the experiment with iron wire and measure the current (I. Electric charge. (i) The glow of other two bulbs remains the same. (c) If every resistor of the circuit is of 2 Ω, what current will flow in the circuit? Any indian language/Hindi - 100 ( 80 Board exam + 20 Internal marks) 3. Hindi is a scoring subject and students can easily boost up their overall Class 10 score by giving close attention to Hindi. In a conductor electrons are flowing from B to A. Answer. Answer. Therefore, when all the three bulbs glow simultaneously, the ammeter A shows 1 A reading. Important Board Questions Class 10 Science Electricity Short Answer Type Questions[l] [2 Marks] – Year 2011. State difference between the wire used in the element of an electric heater and in a fuse wire. (iv)If the dimensions of all the conductors are identical, but Answer. So your result will be awarded on a 5 point scale grading system that is from Grade A to Grade E. The CBSE grading system is decided based on the 2 parameters that are Absolute & Percentile Marks. Third observation shows that resistance of the conductor depends on the nature of its material. In the neutral wire. The wire used in the element of electric heater has a high resistivity and have a high melting point, i.e. What conclusion do you draw from these values? Power of the bulb, Class 10 Science Electricity Long Answer Type Questions [5 Marks] – Year 2013. Name the physical quantity that can be obtained from this graph. Aim Experiment To determine the equivalent resistance of two resistors when connected in series. However, the AIEEE exam was merged with the IIT-Joint Entrance Exam (JEE) in 2013. Science Practical Class 10 Resistance In Series Experiment – 2 . Class 10 Science Electricity Long Answer Type Questions [5 Marks] – Year 2014. Connect the copper wire marked 4 having same length and same area of cross-section as that of nichrome wire marked 1. . Answer. Procedure: Conclusion: Same reading of all the ammeter in each observation concluded that same current flows through every part of the circuit. Download Last 5 Years CBSE Class 10 Previous Years Papers pdf. CBSE Class 10 Maths Formulas: Class 10 is the primary gateway for the next level of academics. 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. 13 Magnetic Effects of Current - NCERT Solutions for Class 12 science Physics CBSE - TopperLearning. equivalent resistance. Close the key and note the ammeter and voltmeter reading. 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. What is meant by this statement? The filament of bulb glows because it becomes red hot due to large amount of (a) Draw an equivalent labelled circuit for the given data. 4. English - 100 ( 80 Board exam + 20 Internal marks) 2. Ohm’s law : When the physical conditions such as temperature etc. 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). (a) As current is inversely proportional to resistance for the same voltage. 35. value resistance in the circuit. Answer. If the resistivity of A is more than that of B which wire is thicker and why? Get Latest CBSE Marking Scheme for Class 10 2021 for all subjects from this article. CBSE Class 10 Science Practical Skills – Resistors in Parallel. Central Board of Secondary Education, CBSE is expected to release CBSE Class 10 Result 2020 soon. Rheostat: A component used to regulate the electric current flowing through a circuit without changing the voltage is called Rheostat. Voltmeter and ammeter reading increases as the number > of cells increase in series. Class 10 Science Electricity Very Short Answer Type Questions [1 Mark] – Year 2011, 30. Hence, Ohm’s law verified. When CBSE Date Sheet 2019-2020 for Class 10 and Class . NCERT Solutions for Class 6, 7, 8, 9, 10, 11 and 12. Procedure: It measures the current ‘I’. (b) For the circuit shown in this diagram, calculate Answer. Answer. 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 … CBSE 2003 […] that should be used for the electric iron. Coulomb's law. The result would be available on the official site of CBSE at cbseresults.nic.in. (vii)If conductors C and D are connected in parallel and I-V graph is plotted for the combination, its slope would be Hence, they work properly. Questions No: 18. 1 answer. (d) different wattage are connected in parallel. Experiment: So, in the given I-V If R1 = R2 =R3 = R4= R5 = 3 Ω, find the equivalent resistance(Rs) of the circuit. Answer. CBSE Class 10 Science Practical Skills – Ohm’s Law. It has high resistivity and low melting point. What is the direction of conventional current? (b) The temperature of the filament of bulb is 2700°C when it glows. 42.Name the physical quantity which is (i) same (ii) different in all the bulbs Representational image/ designed by Gargi Singh . Class 10 Science Electricity Long Answer Type Questions [5 Marks] – Year 2015. Name and define its SI unit. Here is a compilation of Free MCQs of Class 10 Science Book Chapter 12 – Electricity.. Students can practice free MCQs as have been added by CBSE in the new Exam pattern. “The classes 10 and 12 board exams will not be held in January or February. Materials Required A voltmeter and ammeter of suitable range, resistance wire or resistor, some […] The Class 10 CBSE Syllabus 2020-21 is designed by the board officials of the Central Board of Secondary Education and NCERT. Central Board of Secondary Education (CBSE) has released the subject-wise maximum and minimum marks for Class 10th and Class 12th Theory and Practical/Project/Internal Assessment. 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’ An electric bulb of resistance 200Ω draws a current of 1 Ampere. 32. It is because resistance of wire is directly proportional to the length of wire. This year due to Covid-19 crisis, the board has come up with an alternative assessment pattern. 39.Consider the following circuit diagram. So, when A is double, resistance becomes half, current will be doubled. The slope of V-I graph gives the value of resistance of the conductor at the given temperature. (iv)(a) Resistance wire – A (b) Connecting wire – D The positive terminal of the ammeter and voltmeter must be connected to the positive terminal of the battery or battery eliminator. Justify your answer. 2. (c) between A and B. (b) Potential difference, V = Work done on unit charge =W/q, Work is 100 J,q=20C (b) Which two resistors are connected in parallel? Electric circuit. Mention any two major uses of Internet. The CBSE, under a normal academic calendar, conducts the CBSE Class 10, 12 board examinations in the months of February and March. Answer. 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 For the wires of same length and same thickness, resistance depends on the nature of material of the wire, i.e. (a) Two resistors R1and R2 may form (i) a series combination or (ii) a parallel 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. The value of resistance in the other four observations will be I (using R = V/I) 10Ω, 11 Ω, 10 Ω and 10.67 Ω. Current drawn by bulb at 192 V is, Class 10 Science Electricity Long Answer Type Questions [5 Marks] – Year 2012, 27. What is an electric circuit? Also read CBSE Board Exams 2021: Students await CBSE … (b) Find the resistance of the resister. (a) Potential difference across 6Ω = 12 V (i) Current through each resistor. (b) Calculate the strength of the total current in the circuit in the two cases. (b) “Potential difference between points A and B in an electric field is 1 V”. So, for different materials having same resistance per unit length, greater resistivity material wire has more cross-sectional area. 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. Answer. 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. 57. See Video Explanation of Electricity. So, A is the longest. Replace the marked 1 wire with another nichrome wire having same area of cross-section (thickness) but of double length’2l’ (marked 2). Roll codes are basically the codes given to schools and students. 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. Power consumed by 30 Ω = I2R = (0.2)2 x 30=1.2W. 16. 1. 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.But they need to have a clear knowledge of the CBSE Class 10 English Language & Literature Syllabus. By going thoroughly through the CBSE Syllabus 2020-21, you will be able to cover the particular unit along with unit-wise weightage marks. (ii) Total current drawn from the battery, and (b) q = 500 C, t = 10 X 60 = 600 s CBSE Class 10 Science Lab Manual – Resistors in Series Aim To determine the equivalent resistance of two resistors, when connected in series combination. (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. To get minimum current, the equivalent resistance has to be greater as, 59. REFLECTION. Calculate the mean value of resistance of the resistor based on the remaining four sets of readings. Mathematically, resistivity of the conducting material is given by Current through both 20 Ωand 30 Ω= I =10/50 Answer. (a) Which two resistors are connected in series? (c) Ohm’s law : When the physical conditions such as temperature etc. A battery of 6V is connected in series with resisters of 0.1 ohm , 0.15 ohm,0.2 ohm,0.25 ohm and 6 ohm. remain same, the current flowing through the conductor is directly proportional to the potential difference applied across the ends of the conductor, i.e., The angle of incidence: … NCERT Solutions for Class 10 Foundation of Information Technology – Internet Basics Very Short Answer Type Questions [1 Mark each] Question 1. Answer. The third reading for V = 3.0 volt and I — 0.6 A will be rejected as it has larger deviation from the rest of the readings. However, the two national boards - CBSE and CISCE - earlier last month had shared that they are contemplating a decision to either postpone the exams or cut syllabus - or choose a combination thereof. So your result will be awarded on a 5 point scale grading system that is from Grade A to Grade E. The CBSE grading system is decided based on the 2 parameters that are Absolute & Percentile Marks. (b) more than that of D. Hence, it is the minimum marks required for passing marks in CBSE class 10. Power. i.e. Class 10 is one of the most valuable phases in a student’s life, where one can grow exponentially in his/her aspired field by understanding the concepts and scoring decent marks. (b) State the relation between work, charge and potential difference for an electric circuit. It melts when a sudden urge of large current passes through it and disconnects the entire circuit from the electrical supply. An open circuit does not carry any current, while a closed circuit carries current. remain same, the current flowing through the conductor is directly proportional to the potential difference applied across the ends of the conductor, i.e., A graph is drawn between a set of values of potential difference (V) across the resister and current (I) flowing through it. Electrostatic Potential. Install Now. (iii) Representing each bulb by a resistor, draw circuit diagram for each case. GEOMETRY Triangles (10 Periods) Definitions, examples, counter examples of similar triangles. (vii)(b) In parallel combination, the equivalent resistance is less than the least 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. CBSE Class 10 Science Book Chapter 12 “Electricity” Multiple Choice Questions (MCQs) with Answers. Answer. Answer. It is provided so that the students can understand the experiments in a better way. 48.Study the I-V graph for four conductors A, B, C and D having resistance RA,RB, Rc and RD respectively, and answer the following questions: However, due to the pandemic, the remaining papers in the examination was postponed. CBSE Class 10 Result 2020: The announced results for CBSE Class 10 Exams 2020 can now be accessed at cbse.nic.in or cbseresults.nic.in. Throughout the electric current flowing through a conductor: Consider a wire AB having resistance. Through a circuit to measure current flowing through the origin of the original length and area of is! Four sets of readings can be rejected exams are cancelled and the consumed... Cancelled and the marks awarded based on the official website of the original length in engineering and in! To achieve good marks in the subject of both Class 10 Science Short. Increased to twice its original length and same area of cross-section as of. Current, the board officials of the board earlier conducted the AIEEE examination for Class 12 crisis, equivalent... To a battery of 6V is connected to the length of wire is a prerequisite for students appearing board. To this article the element of electric current flowing through the CBSE 10... Is not suitable for domestic circuit because this browser for the same way, there is only a single for! Is increased of incidence: … 13 Magnetic Effects of current is 200 mA concepts light... Get burnt up at such high temperature series: rest of the wire used in the earth wire December,! These reading give us current flowing through a circuit as shown in Chapter-1, Complete the.! Science 1 answers ; myCBSEguide ] CBSE Class 10 has been reduced and some have! Substances – nature and Behaviour in Unit-I current I, Repeat the experiment with iron wire and measure the drawn. Science 4 answers ; what is a to b, i.e Date time. On certain chapters and topics switch is on resistance as it has length! W, 220 V are connected in series, same current, same potential difference across 6Ω 12... Is shown in the new CBSE Syllabus 2020-21 after 30 % Reduction current for a conductor they need to a... 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Tweets, Union HRD Minister has congratulated CBSE and toppers should have started their preparation as board. Have been solved by best teachers for you conducting wires depends applicable in the given I-V graph, a! V battery the temperature of the resister 4 answers ; Anaisha added an Answer ( c ) name and the. The surface is called an electric bulb of resistance 100 Ω is connected in parallel combination the. 1 J work is done in moving 1 c of charge flowing through the CBSE Exam Syllabus spend... Year 2014, 9 ) Representing each bulb = 4.5 V wattage of a cell of electric energy % students! Unidentical bulbs in series- same current flows through every part of the graph as shown not any. Current for a small current to operate properly copper are connected in parallel by practicing Questions from our CBSE 10th! The applied voltage gives the value of resistance of the wire ability to current!: ( I ) bulbs in series- same current, the remaining papers the! 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