(ii) Only diameter of the wire is doubled? Between A and B, the series combination of two resistors of resistances 2 ohm each is connected in parallel with the 1 ohm resistor.:. Electricity Class 10 Important Questions Short Answer Type II. | CBSE Class 10 Science | Chapter12 | Electricity | By Shruti Academy In this video, I have explained about the resistance in the electric circuits in depth from chapter-12 class 10 CBSE NCERT. The Questions and Materials having resistivity in the range of 10 â8 Î© m to 10 â¦ | EduRev Class 10 Question is disucussed on EduRev Study Group by 195 Class 10 Students. unit of charge â¦ (Some resistance brazes are 10 - 20 seconds or longer - not cycles. Resistance of a conductor depends: On its length; On its area of cross-section; On the nature of its material . For Example: Silver has lowest resistivity and is the best conductor. The resistance of a System of Resistors. Your email address will not be published. Resistivity of a conductor is defined as resistance of the conductor of unit length and unit area of cross-section. A conductor has large number of free electrons.When a potential difference is maintained across the ends of conductor,the free electrons move from one end to other end.During their movement,they collide with each other and with atoms of conductor.These collision opposes the movement of electrons Â from one end to other end.This opposition to the flow of electrons due to collision is the resistance.More the collision suffered by electron in a conductor,more is the resistance. It means if the resistance of the material of the conductor is 100 Ω, then the conductance will be 1/100 Ω. Conductor The movement of electron gives rise to the flow of current through metals The unit of electrical resistance is ohm which is defined as volt per ampere. Factors on which resistance of a conductor depends: 1) Resistance of a conductor is directly proportional to length. Sep 30,2020 - What is a resistance?

Resistivity is different in copper,Iron etc because of their nature,but if we change the shape,only resistance will change. Filed Under: Class 10, Electricity Tagged With: area of cross section, cause of resistance, connecting wires, filament of an electric bulb, length, nichrome, resistance, resistivity. Resistance refers to a measure of the opposition to current flow in a particular electrical circuit. Understand the various factors affecting the resistance by watching the video below. Answer: Every resistor has its own resistance but if we combine more than one resistor in series or parallel or both the effective resistance changes, its resultant value of the resistance is called effective resistance. Resistance has an application in protecting the circuit from high current flow. Resistance of a conductor also depends upon nature of material of conductor,temperature of conductor. If the resistance braze generates large amounts of heat for a long time. Here we have given Rajasthan Board RBSE Class 10 Science Solutions Chapter 10 Electricity Current. 2. Resistance definition, the act or power of resisting, opposing, or withstanding. But there is a very basic difference between resistance and resistivity. So, new resistance is (1/16)th of original resistance. How can we decrease the resistance of a wire by a factor of 2? Resistance is the opposition that a substance offers to the flow of electric current.It is represented by the uppercase letter R. The standard unit of resistance is the ohm, sometimes written out as a word, and sometimes symbolized by the uppercase Greek letter omega: . ... Resistance, $$\mathrm{R} \alpha \frac{1}{\mathrm{A}}$$. A wire of resistance 10 ohm is bent in a closed circle. When an electric current of one ampere passes through a â¦ Resistance :-=>It is the opposition to the flow of electric current across a conductor.It is the internal property of conductor.=> S.I unit :- Ohm Resistoâ¦ Class 10 Current Electricity Short Answer Questions TOPIC-2 Combination of resistors (Series and Parallel combination), the heating effect of electric current and electric power. When a potential difference (acceleration) is applied across the conductor (to car), the electrons start moving from negative to positive electrode). The resistivities of a few materials are given below for a comparison. What happens to the resistance of pure metals with an increase in temperature? Obviously, insulators will have a higher value of resistivity than that of conductors. Question 1. NCERT Solutions for Class 10 Science Electricity. Class 10 Science Chapter 12 Board Questions of Electricity. Resistance (R) = 9 ohm Length l = 30 cm New Length (l) = 30 cm = 3/l = 10 cm R=Ï 1/A New Resistance : With change in length, there will be change in area of cross-section also in the same order. When an electric current flows through a bulb or any conductor, the conductor offers some obstruction to the current and this obstruction is known as electrical resistance and is denoted by R. Every material has an electrical resistance and this is the reason why conductors give out heat when current passes through it. Required fields are marked *, Electric charge flows easily through some materials than others. a. The electrical resistance of a conductor is dependent on the following factors: Electrical resistance is directly proportional to length (L) of the conductor and inversely proportional to the cross-sectional area (A). What is Resistance? Class. copper wire (B)=length (l),area of cross section is more than X. 6 min. Question 10. Name the factor that would reduce the resistance through an electric cord. Author of this website, Mrs Shilpi Nagpal is MSc (Hons, Chemistry) and BSc (Hons, Chemistry) from Delhi University, B.Ed (I. P. University) and has many years of experience in teaching.Â SheÂ has started this educational website with the mindset of spreadingÂ Free Education to everyone. Q3. Since resistance R is inversely proportional to the conductance s. For example, a car is moving at a speed of 10 kmph, keeping the distance as 1 km. Sep 02,2020 - If a wire is increased by 20% .what is resistance? HUMAN EYE AND THE COLOURFUL WORLD. Ans: The unit of resistivity is given as Ohm-metre. Class 10 Science Home Page. When two or more resistors are connected in series: The current through the circuit remains the same. The electrical resistivity of silver is 1.60 × 10-6 Î© m. What will be the resistance of a silver wire of length 10 m and cross-sectional area 2 × 10-3 m2? Therefore, the total resistance of the circuit is given by Thus, 1 A current will flow through 10 Î© resistor and 1 A will flow through the lamp and conductor of 5 Î© resistance. Class 10 Science Chapter 12 Extra Questions and Answers Electricity. It forms a real image three times larger than the object. (d) S.I. Disadvantages of series arrangement of resistors. (Some resistance brazes are 10 - 20 seconds or longer - not cycles. ... A current of 2 A passes through a conductor and produces 80 joules of heat in 10 seconds. Pre Boards. Reading of ammeter in second case is more that of reading in 1st case. S.I. Class 10 Science Home Page. KSEEB SSLC Class 10 Science Solutions Chapter 12 Electricity are part of KSEEB SSLC Class 10 Science Solutions. The SI unit of electrical resistivity is ohms.metre. Resistance of uniform metallic conductor is directly proportional to its length and inversely proportional to area of â¦ The electrical resistance of an object refers to the measure of its opposition to the flow of electric current. Practice to excel and get familiar with the paper pattern and the type of questions. Ans: As we know that $$\rho =\frac{E}{J}$$, therefore by increasing the cross-sectional area of the electric cord there will be a reduction in the resistance. Find the equivalent resistance of the combination. Q1. The resistance class is composed by two numbers, divided by a dot. The current flow increases, the resistance acts as a speed breaker to the accelerated car (high current flow). 2) Resistance of a conductor is inversely proportional to area of cross section. Class 10 Resistance of a System of Resistors. Q6. 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The electrical resistance measures how much the flow of this, Difference Between Resistance And Resistivity. What is Resistance? 1. Since A is doubled, keeping resistance and length constant, resistivity will also be doubled. class 2: LIMITED RESISTANCE The materials belonging to this class … what is resistance in physics class 10 . Class 10. Economics Chapter 4 Globalisation and The Indian Economy â Notes & Study Material, à¤µà¤¾à¤à¥à¤¯ à¤à¤° à¤µà¤¾à¤à¥à¤¯ à¤à¥ à¤­à¥à¤¦, Economics Chapter 3 Money and Credit â Notes & Study Material, Compounds of Xenon and uses of Noble Gases, Characteristics and Physical Properties of Group 18 Elements, Oxoacids of Halogens and Interhalogen Compounds, English Alphabets with Phonics Pronunciation. (c) S.I. define resistance of a conductor class 10 Aucun commentaire sur define resistance of a conductor class 10 Publié dans Non classé Par Publié le 31 octobre 2020 [CBSE 2012], A 9Î© resistance is cut into three equal part and connected it into parallel. Resistance and Resistivity. Electrical resistance is defined as the property of an electrical component to resist the flow of electric current. ResistanceResistivityThe electrical resistance of an object is a measure of its opposition to the flow of electric current.Resistivity is the characteristic property of the material by which it resists the amount of current through it.It depends upon the length, area of cross-section and nature of t Physics. What is Resistance? Factors Affecting Resistance. The first corresponds to the nominal The time will be 1/10 hr. How are given resistances connected so that equivalent resistance is increased? 2. What happens to the resistance of insulators with an increase in temperature? What ... What will be the length of this wire to make its resistance 10 Ω? Resistance is the property of a conductor, which determines the quantity of current that passes through it when a potential difference is applied across it. Hence, length of the wire, If the diameter of the wire is doubled, new diameter . Ans. Question 5 WhyÂ Filament of an electric bulb is made up of tungsten metal? Q33. In series combination. Therefore, resistance Resistance of second wire is double than 1st wire. Last Updated on May 4, 2020 By Mrs Shilpi Nagpal Leave a Comment. Class 10. What is Resistance? See more. Sin categoría ... Resistance is the term which is the resisting of flowing of charges from a specific substance of any size. CBSE Class 10 Science Practicals Lab Manual MCQ Ðnswers: Physics Lab Manual CBSE Class 10 Scoring Key With Explanation (b) Ammeter measures current. Ans: The reciprocal of resistivity is conductivity. (ii) Now, a resistance of 10 Î© is connected in parallel with the series combination. It is made of copper wires which is coiled around a ceramic rod and the outer part of the resistor is coated with an insulating paint. Equivalent resistance of the circuit is the sum of individual resistances. The higher the temperature the higher is the resistance. Answer. Pre Boards. Question 1 A piece of wire is redrawn Â by pulling it until its length is doubles.Compare the new resistance with the original value? [CBSE 2010] Ans. a)Resistivity of Cu and Al is low(act as a good conductor).