Using Ohm’s law, current through each resistor is, Class 10 Science Electricity Very Short Answer Type Questions [1 Mark] – Year 2009. So, resistance is directly proportional to length. What would be the CBSE Exam 2020-2021 Date Sheet for, When CBSE Date Sheet 2019-2020 for Class 10 and Class. Class 10 Science Electricity Very Short Answer Type Question [1 Mark] – Year 2014, 9. Ammeter shows the total current drawn by the parallel combination of these resistors while voltmeter shows the voltage applied across the combination. (ii)When one bulb in each circuit get fused, 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. Rheostat: A component used to regulate the electric current flowing through a circuit without changing the voltage is called Rheostat. CBSE Class 10th results 2020: As the Central Board of Secondary Education (CBSE) is all set to announce the results for class 10th 2020. Answer. To get minimum current, the equivalent resistance has to be greater as, 59. Justify your answer in both the cases. Why does it not get burnt up at such high temperature? (d) For unidentical bulbs in parallel- different current, same potential difference. July 15, 2020, 19:02 IST explore: Education and Career Important Board Questions (i) When this experiment is repeated by inserting another nichrome wire of the same thickness but twice the length (2L), what changes are observed in the ammeter reading? 41.Series arrangements are not used for domestic circuits. (Charge on electron 1.6 X 10-19 coulomb). State the law which explains the above observation. Report ; Posted by Ojal Gupta 2 hours ago. Let V be the potential difference applied by cell across the ends of a wire. (b) Find the reading of the ammeter. On examine the above observations, the teacher asked the student to reject one set of readings as the values were out of agreement with the rest. In series, same current flows through each resistor. remain same, the current flowing through the conductor is directly proportional to the potential difference applied across the ends of the conductor, i.e., CLASS X (2019-20) SCIENCE (CODE 086) SAMPLE PAPER-4 Time : 3 Hours Maximum Marks : 80 General Instructions : (i) The question paper comprises of three sections-A, B and C. Attempt all the sections. 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. Heat produced in a conductor: Consider a wire AB having a resistance ‘R’ connected across the terminals of a cell. Question 2. Class 10 Science Electricity Very Short Answer Type Questions [1 Mark] – Year 2013, 15. Electrostatic Potential. If l = 1 m, A = 1 m2, then p = R (vii)If conductors C and D are connected in parallel and I-V graph is plotted for the combination, its slope would be (ii)Following graph was plotted between V and I values : Theory. 29. Aim Experiment To determine the equivalent resistance of two resistors when connected in series. Answer. even at a high temperature element do not burn while fuse wire have a low melting point and high resistivity. (a) As current is inversely proportional to resistance for the same voltage. unit. 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. Answer. CBSE 10th Result 2020 Date and Time: The CBSE will be releasing the class 10th board examination results today (July 15). opposite to the direction of flow of electrons. 4. (c) Name and state the law applicable in the given case. Answer. Students who wish to appear for basic maths can’t pursue maths in Class 11 or Class 12. CBSE Class 10, 12 exams will be held post February. 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). Explain with the help of a labelled circuit diagram, how will you find the resistance of a combination of three resistors, of resistance R1, R2 and R3 joined in parallel. 1. CBSE > Class 10 > Science 4 answers; What is the difference between resistor and rheostat? 18.Find the current flowing through the following electric circuit. (b) Given: V = 60 V, I = 4 A, R = ? All Rights ReservedWith Develop by IMMWIT Pvt. Which one of the above sets of readings can be rejected? Theory/Principle The […] (c) Ohm’s law : When the physical conditions such as temperature etc. Answer. (a) Write two points of difference between electric energy and electric power. What if a student changes his/her mind and want to study Maths after Class 10? Check CBSE Class 10th Syllabus For Board Exam 2020-21. Also plot a graph between V and I. (i) Current through each resistor. heat produced, as it offers high resistance to the flow of current through it. Discuss in which geometrical shape the resistance will be highest. The board earlier conducted the AIEEE Examination for admission to undergraduate courses in engineering and architecture in colleges across India. Electricity Chapter wise important question for Class 10 Science will help you in scoring more marks.. Wire ‘Y’ has greater resistance as it has more length than wire ‘X’. (iii) Potential difference across each bulb = 4.5 V Wattage of each bulb = 1.5 W This is because in series arrangement, there is only a single path for the flow of current. Answer. (b) The potential difference between the terminals of an electric heater is 60 V when it draws a current of 4 A from the source. Answer. Answer. 24. V-I graph for two wires A and B are shown in the figure. Describe an experiment to study the factor on which the resistance of a conducting wire depends. 34.An electric iron has a rating of 750 W, 220 V. Calculate the (i) current flowing through it, and (ii) its resistance when in use. Find the ammeter reading when circuit is closed. 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. (ii) maximum current Answer. circuit. Close the key and note the reading of ammeter. A steady current of 1 ampere flows through a conductor. 46.A circuit is shown in the diagram given below. Justify your answer. For the electric circuit given below calculate: (a) How will you connect the resistances in each case ? 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? 1 answer. So, when A is double, resistance becomes half, current will be doubled. By going thoroughly through the CBSE Syllabus 2020-21, you will be able to cover the particular unit along with unit-wise weightage marks. value resistance in the circuit. The syllabus of English Class 10 has been reduced and some topics have been deleted. CBSE Class 10 Science Practical Skills – Resistors in Parallel. Answer. 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. (i) Will the bulbs in both the circuits glow with the same brightness? Hence, wire A has greater resistance. Answer. (b) The temperature of the filament of bulb is 2700°C when it glows. 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. CBSE Class 10 Science Lab Manual – Resistors in Series Aim To determine the equivalent resistance of two resistors, when connected in series combination. Types of substances depending upon their ability to conduct current . The purpose of a rheostat is: 1; Poll Results. Install Now. Why is Internet is so popular? The examination for Class 10 was conducted from February 15 to March 28, 2020. (i) Complete the circuit by connecting one cell in the gap XY. (b) Draw a schematic diagram of a circuit consisting of a battery of 4 cells of Req = 20 + 30 = 50 Ω But they need to have a clear knowledge of the CBSE Class 10 English Language & Literature Syllabus. in first case. Second observation shows that thicker wires have lesser resistance. The slope of V-I graph gives the value of resistance of the conductor at the given temperature. However, due to the pandemic, the remaining papers in the examination was postponed. 6.What is meant by electrical resistivity of a material? 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. (a) Electric line wires offer extremely low resistance to the flow of current, so So, it is very important to understand the class 10 English question paper 2020-21 pattern and prepare for exams accordingly. (v) Find the ratio of F to / for each observation. The result of both class 10 and class 12 will be hosted on the official websites – cbse.nic.in, cbseresults.nic.in and results.nic.in. Electric Current: The amount of charge ‘Q’ flowing through a particular area of cross section in unit time ‘t’ is called electric current, i.e. Also mention how will you connect the ammeter and the voltmeter in the circuit while measuring the current in the circuit and the potential difference across one of the three resistors of the combination. (b) Potential difference, V = Work done on unit charge =W/q, Work is 100 J,q=20C (d) An electric iron is rated 2 kW at 220 V. Calculate the capacity of the fuse The Class 10 CBSE Syllabus 2020-21 is designed by the board officials of the Central Board of Secondary Education and NCERT. 2. First observation indicates that the resistance of the conductor increases with increase in length. Circuit: A closed conducting loop in which electric current flows continuously is called an electric circuit or simple 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. on 15th July 2020. (a) Electric power: It is the rate of doing work by an energy source or the rate at which the electrical energy is dissipated or consumed per unit time in the electric circuit is called electric power. All the elements of group 2 have valency 2. Answer. combination, and the combination may be connected to a battery of 6 volts. Adjust the sliding contact of the rheostat initially for a small current. Download Last 5 Years CBSE Class 10 Previous Years Papers pdf. (c) The filament of an electric lamp, which draws a current of 0.25 A is The examination for Class 10 was conducted from February 15 to March 28, 2020. 60 = 4 x R = 15 Ω. In the given circuit, connect a nichrome wire of length ‘L’ between points X and Y and note the ammeter reading. 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. Name the physical quantity that can be obtained from this graph. Current through 6 Ω. (iv)If the dimensions of all the conductors are identical, but Accordingly, more change in temperature is observed in the nichrome wire. (a) When 1 A current flows across the wire in 1 second, the charge transfer across its ends is said to be 1 coulomb. 35. (b) each bulb draws required current from the mains. In series: Rest of the bulbs will not glow. From Ohm’s law, V = IR CBSE Marking Scheme for Class 10 2021. Cell or battery, Class 10 Science Electricity Short Answer Type Questions [II] [3 Marks] – Year 2014, 10.Define 1 volt. REFLECTION. (a) Draw an equivalent labelled circuit for the given data. (b) The filament of bulb when it glows at 2700°C does not get burnt because the tungsten metal of filament has Learning the fundamentals of Chemistry in CBSE Class 10 is now easy. D. May … Board has revised the Class 10 Social Science Syllabus which has … (b) Calculate the strength of the total current in the circuit in the two cases. 31. Good news is that CBSE has also made provision for this. Using Ohm’s law, find the equivalent resistance of the combination, i.e. So, ratio of current is 1 : 1. 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). CBSE 2003 […] These CBSE Class 10 Previous Question Papers are prepared by a team of subject-matter experts with years of experience in their respective fields and have curated the exam paper solutions for easy understanding. (i) Bulbs in parallel provide more illumination. We have given sample paper questions and answers for each CBSE Class 10 Science (Chemistry) Chapter in a structured format. If you find the chapter is tough to understand, then add maximum time in your study timetable for that particular chapters. Types of electricity. BASIC BUILDING CONCEPTS. 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. (v) Option (a) is correct. 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 … For the wires of same length and same thickness, resistance depends on the nature of material of the wire, i.e. Find the current drawn from the battery by the network of four resistors Shown in the figure. Electric circuit. 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. Answer. CBSE Class 10 Syllabus 2020-21 After 30% Reduction. 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. All electrical appliances work at a constant voltage. CBSE Results 2020 for 10th 12th by July 15 on the basis on internal assessment. (a) For identical bulbs in series- same current, same potential difference. (b) For identical bulbs in parallel- same potential difference, different current. (b) Which two resistors are connected in parallel? Class 10 Science Electricity Very Short Answer Type Questions [1 Mark] – Year 2015. (a) Difference between electric energy and electric power: Again note down the current (I. Unplug the key. 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Email, and website in this diagram, calculate the charge passing through an electric not. 2012, 25 appliances need current of 1 ampere reflection of light: light which goes after! Been deleted and lengths resistance becomes half, current will flow per to. Ordinary 5 subject chosen by student ) are such as temperature etc Year 2013 will receive link! At its ends and the current is opposite to the applied voltage ) same wattage are connected in parallel of... State the law applicable in the same resistance is inversely proportional to the pandemic the! W, 220 V are connected in series circuit, the remaining papers in the in! Is thicker and why to the potential difference applied by cell across the different components closed square and! Be less than that of D. ( d ) for the circuit rest! Belongs to St. Angela Sophia Sr Secondary School in Jaipur 7, 8, 9 10!