37.Explain the role of fuse in series with any electrical appliance in an electric circuit. 50. 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. 13.Two wires A and B are of equal length and have equal resistance. (a) What do the following circuit symbols represent? In a series of tweets, Union HRD Minister has congratulated CBSE and toppers. 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. V-I graph for two wires A and B are shown in the figure. (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. So, ratio of current is 1 : 1. So, when A is double, resistance becomes half, current will be doubled. (a)(i) Ammeter reading in the second case is half of the ammeter reading Calculate the charge passing through an electric bulb in 20 minutes if the value of current is 200 mA. (c) If every resistor of the circuit is of 2 Ω, what current will flow in the circuit? (vii)If conductors C and D are connected in parallel and I-V graph is plotted for the combination, its slope would be Two identical wires one of nichrome and other of copper are connected in series and a current (I) is passed through them. (ii) Rheostat/Variable resistor 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. 62. An electric bulb of resistance 200Ω draws a current of 1 Ampere. Why? Give justification for your answer. (iv)If the dimensions of all the conductors are identical, but (v) Option (a) is correct. 1 answer. English - 100 ( 80 Board exam + 20 Internal marks) 2. Replace the marked 1 wire with another nichrome wire having same area of cross-section (thickness) but of double length’2l’ (marked 2). (c) For unidentical bulbs in series- same current, different potential difference. .’. Important Board Questions A. (b) more than that of A. (b) Calculate the current in a circuit if 500 C of charge passes through it in 10 minutes. See Video Explanation of Electricity. Procedure: Find the current in 3Ω resistor. Procedure: Conclusion: Same reading of all the ammeter in each observation concluded that same current flows through every part of the circuit. 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. It has high resistivity and low melting point. (b) For the circuit shown in this diagram, calculate Answer. Click on image to update the captcha. The board earlier conducted the AIEEE Examination for admission to undergraduate courses in engineering and architecture in colleges across India. 8.State Ohm’s law. Answer. Can a student study Maths after Class 10 if he/she opt for Basic Maths? 10. Resistors are joined in the circuit in two different methods, i.e., in series and in parallel. Types of substances depending upon their ability to conduct current . (vi) If conductors A and B are connected in series and I-F graph is plotted for the combination, its slope would be Class 10 Science Electricity Very Short Answer Type Questions [1 Mark] – Year 2013, 15. […] Calculate (i) its power, (ii) its resistance and (iii) the energy consumed, if this bulb is lighted for four hours. Why should a fuse with defined rating for an electric circuit not be replaced by one with a larger rating? 2. Calculate the value of current flowing through the 20 Ω resistor and the power consumed by the 30 Ωresistor. 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. 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 positive terminal of the ammeter and voltmeter must be connected to the positive terminal of the battery or battery eliminator. Central Board of Secondary Education, CBSE is expected to release CBSE Class 10 Result 2020 soon. Ammeter shows the total current drawn by the parallel combination of these resistors while voltmeter shows the voltage applied across the combination. Circuit: A closed conducting loop in which electric current flows continuously is called an electric circuit or simple circuit. Resistance of. Describe an experiment to study the factor on which the resistance of a conducting wire depends. No!! (ii) Total current drawn from the battery, and Ohm’s law : When the physical conditions such as temperature etc. Answer. 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 Fuse wire is a safety device connected in series with the live wire of circuit. 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. Wire ‘Y’ has greater resistance as it has more length than wire ‘X’. (b) State the relationship between the electric current, the charge moving through a conductor and the time of flow. Find the current drawn from the battery by the network of four resistors Shown in the figure. Answer. The Class 10 CBSE Syllabus 2020-21 is designed by the board officials of the Central Board of Secondary Education and NCERT. 56. (i) What will happen to the glow of other two bulbs if the bulb B3 gets fused? Which one of the above sets of readings can be rejected? CBSE Class 10 Result 2020 Declared: 78.95% Transgender Students Clear Exams. CBSE Class 10 Science Chapter 12 - Electricity . All electrical appliances work at a constant voltage. (vi) Plot a graph between V (y-axis) and I (x-axis). CBSE 2003 […] in first case. Characteristics of parallel combination Voltage across each resistor is same and … Answer. In parallel: Rest of the bulbs will continue to glow as in parallel connection, 4. Class 10 Science Electricity Long Answer Type Questions [5 Marks] – Year 2015. (b) Find the reading of the ammeter. So, in the given I-V graph, slope for parallel combination is more than that of D, Class 10 Science Electricity Short Answer Type Question[l] [2 Marks] – Year 2010, 49. Different wires drew different amount of current from the same cell. CBSE Class 10th results 2020: As the Central Board of Secondary Education (CBSE) is all set to announce the results for class 10th 2020. The fuse of which of the two devices is likely to burn when the switch is ON? 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. Wattage of each bulb = 1.5 W (iii) Internal choice is given in each sections. 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 Mathematically, resistivity of the conducting material is given by Answer. Any indian language/Hindi - 100 ( 80 Board exam + 20 Internal marks) 3. Answer. 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 . Can a student study Maths after Class 10 if he/she opt for Basic Maths? 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. So, A is the longest. For the electric circuit given below calculate: Electricity (iv)(a) Resistance wire – A (b) Connecting wire – D 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. A given length of a wire is doubled on itself and this process is repeated once again. If the resistivity of A is more than that of B which wire is thicker and why? MCQ , Class 10, Physics . (iii) Circuit diagram. 2. 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. Greater than slope of V-I graph, greater will be the resistance of given metallic wire. In a conductor electrons are flowing from B to A. (c) between A and B. Cell or battery, Class 10 Science Electricity Short Answer Type Questions [II] [3 Marks] – Year 2014, 10.Define 1 volt. (c) Kilowatt hour – Commercial unit of electrical energy (b) For identical bulbs in parallel- same potential difference, different current. (a) Which two resistors are connected in series? 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. 44.Five resistors are connected in a circuit as shown. (i) Current in each resistor, Therefore, when all the three bulbs glow simultaneously, the ammeter A shows 1 A reading. (c) What is the commercial unit of electric energy? So, amount of charge flowing the filament of electric lamp Find the number of electrons that will flow per second to constitute a current of 1 ampere. Types of electricity. The results are announced by the end of May. Will the rest of the bulbs continue to glow in each circuit? Convert it into joules. (a) Though same current flows through the electric line wires and the filament of bulb, yet only the filament glows. Central Board of Secondary Education, CBSE is expected to release CBSE Class 10 Result 2020 soon. Explain the above statement. (b) The filament of bulb when it glows at 2700°C does not get burnt because the tungsten metal of filament has 16. The direction of conventional current is A to B, i.e. Otherwise, they might miss out on certain chapters and topics. Free PDF Download - Best collection of CBSE topper Notes, Important Questions, Sample papers and NCERT Solutions for CBSE Class 10 Physics Electricity. This is because Answer. This means the resistors must be connected in parallel. This is because in series arrangement, there is only a single path for the flow of current. Third observation shows that resistance of the conductor depends on the nature of its material. (a) As current is inversely proportional to resistance for the same voltage. 2. Theory/Principle The […] In series. Name the physical quantity that can be obtained from this graph. Class 10 Science Electricity Short Answer Type Questions[ll] [3 Marks] – Year 2009, 58. ... 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. Again note down the current (I. Unplug the key. 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. If both wires are of same length and same thickness, which of the two is made of a material of high resistivity? In which combination, will the potential difference acrossR1 and across R2 be the same and in which combination, will the current through R1 and through R2 be the same? Circuit diagram: The schematic representation which shows the arrangement of different devices or components by using their electrical symbols is called a circuit diagram. July 15, 2020, 19:02 IST explore: Education and Career 29. The purpose of a rheostat is: 1; Poll Results. 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. Class 10 Science Electricity Short Answer Type Questions [3 Marks] – Year 2013. No!! 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’ (a) How will you connect the resistances in each case ? Question 2. (b) An electrical fuse is rated at 2 A. In CBSE weightage ( if ordinary 5 subject chosen by student) are such as:- 1. 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. Live wire. Which is the best website providing NCERT Solutions? 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