Name the physical quantity that can be obtained from this graph. What happens to resistance of a conductor when its area of cross-section is increased? V-I graph is a straight line passing through the origin of the graph as shown. It measures the current ‘I’. 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 Chapter Includes the following topics: Friction: Electric current. 1 answer. The board earlier conducted the AIEEE Examination for admission to undergraduate courses in engineering and architecture in colleges across India. (i) the resultant resistance. However, the AIEEE exam was merged with the IIT-Joint Entrance Exam (JEE) in 2013. Why? Two devices of rating 44 W, 220 V and 11 W, 220 V are connected in series. Answer. By what factor does the resistance of the wire change? Give reason. 23.Draw a schematic diagrams of an electric circuit comprising of 3 cells and an electric bulb, ammeter, plug-key in the ON mode and another with same components but with two bulbs in parallel and a voltmeter across the combination. But, in case if we use a larger rating instead of a defined rating, then it will not protect the circuit as high current will easily pass through it and it will not melt. (b) Find the reading of the ammeter. value resistance in the circuit. Like every year, the CBSE Results will be published online on the official website of the board i.e. State difference between the wire used in the element of an electric heater and in a fuse wire. Answer. Coulomb's law. Calculate the charge passing through an electric bulb in 20 minutes if the value of current is 200 mA. 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. Class 10 Science Electricity Short Answer Type Questions[ll] [3 Marks] – Year 2015. 4. Electric charge. Answer. (a) Which two resistors are connected in series? they do not glow because negligible heat is produced in it. The direction of conventional current is A to B, i.e. Discuss in which geometrical shape the resistance will be highest. opposite to the direction of flow of electrons. 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). Therefore, when all the three bulbs glow simultaneously, the ammeter A shows 1 A reading. (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? Close the key and note the reading of ammeter. (a) Though same current flows through the electric line wires and the filament of bulb, yet only the filament glows. Name and define its SI unit. Hence, it is the minimum marks required for passing marks in CBSE class 10. Two resistors with resistances 5Ω and 10 Ω are to be connected to a battery of emf 6 V so as to obtain: 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 Before knowing what is a role code, it is important to have a clear idea about CBSE. 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. Board has revised the Class 10 Social Science Syllabus which has … Aim: Same current flows through every part of the above circuit. A steady current of 1 ampere flows through a conductor. Incident light: Light which falls on the surface is called incident light. Class 10 Science Electricity Very Short Answer Type Question [1 Mark] – Year 2014, 9. (b) Calculate the current in a circuit if 500 C of charge passes through it in 10 minutes. (d) For unidentical bulbs in parallel- different current, same potential difference. Write the necessary conditions for its validity. Use this circuit to show that the same current flows through every part of the circuit. 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 on 15th July 2020. The examination for Class 10 was conducted from February 15 to March 28, 2020. (c) different wattage are connected in series. 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. The filament of bulb glows because it becomes red hot due to large amount of Justify your answer. Remove marked 3 nichrome wire from the gap XY. 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. 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. 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. Resistance of a wire can be increased or decreased depending on its combinations and connections in a circuit. CBSE Physics Lab Manual for Class 12 is very reliable and trustable notes provided to the students to achieve good marks in the examination. Third observation shows that resistance of the conductor depends on the nature of its material. 1 kWh = 1000 Wh = 1000 J/S x 3600 sec Adjust the sliding contact of the rheostat initially for a small current. CBSE Class 10 Science Chapter 12 - Electricity . CBSE Marking Scheme for Class 10 2021. Theory/Principle The […] All Rights ReservedWith Develop by IMMWIT Pvt. (c) between A and B. Also read CBSE Board Exams 2021: Students await CBSE … (ii)In parallel combination, potential difference across each resistance will remain same. Types of substances depending upon their ability to conduct current . (a) When 1 A current flows across the wire in 1 second, the charge transfer across its ends is said to be 1 coulomb. Using Ohm’s law, find the equivalent resistance of the combination, i.e. Current through both 20 Ωand 30 Ω= I =10/50 A graph is drawn between a set of values of potential difference (V) across the resister and current (I) flowing through it. (a) Write two points of difference between electric energy and electric power. (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. English - 100 ( 80 Board exam + 20 Internal marks) 2. (c) If every resistor of the circuit is of 2 Ω, what current will flow in the circuit? 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. The unseen passages in CBSE Class 10 English Sample Paper 2020-21 will have only MCQs. (b) Potential difference, V = Work done on unit charge =W/q, Work is 100 J,q=20C Answer. (c) The filament of an electric lamp, which draws a current of 0.25 A is unit. 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. Consider the following electric circuit: Heat produced, H = VIt. (iii)If all the conductors are of same thickness and of same material, which is the longest? 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. (b) more than that of A. (d) different wattage are connected in parallel. (b) different paths are available for the flow of current. CBSE notes for class 10 science Chapter 10 Light - Reflection and Refraction. ... 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. Answer. 11. (a) How is the direction of electric current related to the direction of flow of electrons in a wire? Answer. Answer. (a) less than that of A. Greater than slope of V-I graph, greater will be the resistance of given metallic wire. CBSE Class 10, 12 exams will be held post February. CBSE Class 10 Syllabus for Hindi is divided into Hindi-A and Hindi-B. 6.What is meant by electrical resistivity of a material? Resistance of. 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. Why does it not get burnt up at such high temperature? Rheostat: A component used to regulate the electric current flowing through a circuit without changing the voltage is called Rheostat. These papers are of great impact as they can provide a reliable finishing to the long and wide board exam preparation of every student. Answer. One ampere of current is that current which flow when one coulomb of electric charge flowing through a particular area of cross-section of the conductor in one second, i.e. Representational image/ designed by Gargi Singh 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 … Free PDF Download - Best collection of CBSE topper Notes, Important Questions, Sample papers and NCERT Solutions for CBSE Class 10 Physics Electricity. Again note down the current (I. Unplug the key. 28. Class 10 Science Electricity Very Short Answer Type Questions [1 Mark] – Year 2015. In a metal, flow of electrons carrying negative charge constitutes the current. An electric bulb of resistance 200Ω draws a current of 1 Ampere. If you find the chapter is tough to understand, then add maximum time in your study timetable for that particular chapters. CBSE 10th Compartment Result 2020 Declared: The Central Board of Secondary Education has released the CBSE Board Class 10 compartmental results 2020 for all the students who appeared in the exam. (b) Given: V = 60 V, I = 4 A, R = ? (a) lesser than that of A. What is meant by electric current? Potential difference between two points is. In the given circuit, connect a nichrome wire of length ‘L’ between points X and Y and note the ammeter reading. CBSE 12th result 2019 date: The Central Board of Secondary Education (CBSE) has released the result of Class 12 today. 14. Questions No: 18. (iii) Circuit diagram. In CBSE weightage ( if ordinary 5 subject chosen by student) are such as:- 1. Answer. Describe an experiment to study the factor on which the resistance of a conducting wire depends. CBSE Class 10 Science Lab Manual – Resistors in Series Aim To determine the equivalent resistance of two resistors, when connected in series combination. (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. CBSE 2003 […] 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. So, resistance is inversely proportional to area of cross section of the wire. 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. But they need to have a clear knowledge of the CBSE Class 10 English Language & Literature Syllabus. 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. (b) q = 500 C, t = 10 X 60 = 600 s 20. The positive terminal of the ammeter and voltmeter must be connected to the positive terminal of the battery or battery eliminator. Rheostat: A component used to regulate the electric current flowing through a circuit without changing the voltage is called Rheostat. Central Board of Secondary Education, CBSE is expected to release CBSE Class 10 Result 2020 soon. 8.State Ohm’s law. Ammeter shows the total current drawn by the parallel combination of these resistors while voltmeter shows the voltage applied across the combination. 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