Resistance of a conductor also depends upon nature of material of conductor,temperature of conductor. Ans: As we know that $$\rho =\frac{E}{J}$$. Question 8. 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. Pre Boards. 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. Ans: The unit of resistivity is given as Ohm-metre. Resistance. Question 4 Why connecting wires in an electric circuit are made of Cu and Al? Your email address will not be published. HUMAN EYE AND THE COLOURFUL WORLD. Ans: The reciprocal of resistivity is conductivity. What is effective resistance? Find the equivalent resistance of the combination. How are given resistances connected so that equivalent resistance is increased? 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 from one end to other end.This opposition to the flow of electrons … The resistivities of a few materials are given below for a comparison. Filed Under: Class 10, Electricity Tagged With: resistance, resistors are connected in series, series arrangement of resistors About Mrs Shilpi Nagpal 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. Resistivity is a qualitative measurement of a material’s ability to resist flowing electric current. Class-10 Goyal Brothers Electric Circuit, Resistance and Ohm’s Law ICSE Physics Solutions Ch-8 .We Provide Step by Step Answer of Exercise, MCQs, Numerical Problem Questions of Exercise-1 Goyal Brothers Electric Circuit, Resistance and Ohm’s Law ICSE Class-10 .Visit official Website CISCE for detail information about ICSE Board Class-10 Physics. There is a belief among some circles that 'it's easy to take a basic shed and convert to to a house or granny flat and this makes it a cheaper way to build'. Factors on which resistance of a conductor depends: 1) Resistance of a conductor is directly proportional to length. Class 10 Physics Electricity: Factors on which Resistance depends: Factors on which Resistance depends. (ii) Now, a resistance of 10 Î© is connected in parallel with the series combination. Resistivity does not depend on l and A but on nature of material of which substance is made of. where ρ is the resistivity of the material (measured in Ωm, ohm meter). These questions are useful for CBSE Board Examination preparation and practicing to class tests. Factors Affecting Resistance. NCERT Solutions for Class 10 Science Electricity Questions and Answers Intext Questions Page Number - 200 Q1. Ans: As the temperature increases, the resistance of pure metals increase. In these sections, we discussed â¦ A resistor is a electrical componet with a predetermined electrical resistance, like 1 ohm, 10 ohms 100 ohms 10000 ohms etc. 33.A 9Î© resistance is cut into three equal parts and connected in parallel. Specific resistance or resistivity (Ï), of a conductor, is defined as the resistance of a conductor of unit length and unit area of cross-section.From the factors affecting the resistance of a conductor, the resistance is given by,Its SI unit is ohm-mSpecific resistance or resistivity is the characteristic property of the material of the â¦ The unit of electrical resistance is ohm which is defined as volt per ampere. 2) Filament of an electric bulb is made up of tungsten metal. Difference Between Resistance & Resistivity One of the major difference between the resistance and the resistivity of the material is that the resistance opposes the flow of free electrons whereas the resistivity is the property of the material which defines the resistance of the material having specific dimension. The first corresponds to the nominal Resistance refers to a measure of the opposition to current flow in a particular electrical circuit. ICSE Class 10. Answer: Let R 1 and R 2 be the two resistances, Between A and B, the series combination of two resistors of resistances 2 ohm each is connected in parallel with the 1 ohm resistor.:. Therefore, conductance increases and the resistance decreases. An object is placed at a distance of 10 cm in front of a concave mirror. (d) S.I. (c) S.I. ICSE Class 10. The reason behind this is the increase in the number of electrons in the conduction band which reduces the mobility thereby increasing the resistance. 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. Therefore, resistance Answer. 1. ... Resistance, $$\mathrm{R} \alpha \frac{1}{\mathrm{A}}$$. It forms a real image three times larger than the object. I have seen some over one minute long.) KSEEB SSLC Class 10 Science Solutions Chapter 12 Electricity are part of KSEEB SSLC Class 10 Science Solutions. What is Resistance? If the resistance braze generates large amounts of heat for a long time. VERY SHORT ANSWER TYPE QUESTIONS [1 Mark] Q. Unfortunately, this is not correct. | EduRev Class 10 Question is disucussed on EduRev Study Group by 189 Class 10 Students. Filed Under: Class 10, Electricity Tagged With: resistance, resistors are connected in series, series arrangement of resistors About Mrs Shilpi Nagpal 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 â¦ Copper wire(A)= length(l) , area of cross section X, copper wire (B)=length (l),area of cross section X. Connect wire A between the terminal,note ammeter reading. Q1. 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? Class 10 Science Electricity Short Answer Type Questions[l] [2 Marks] â Year 2011. Resistor is defined as The main purpose of resistor is to reduce the current flow and to lower the voltage in any particular portion of the circuit. Learn more about other related concepts with the help of engaging video lessons by visiting BYJU’S, Your email address will not be published. So, new resistance is (1/16)th of original resistance. 1. What is Resistance? [CBSE 2010] Ans. 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. A material whose resistivity is low is a good conductor ie low resistivity means less resistance to flow of current. The time will be 1/10 hr. Resistance increases and hence less electricity can pass through it Note - This is the reason that we use thick wire to carry more electrical load (as thick wire has more area of cross section and offers less resistance and more electricity can pass through it ) Nature of Material Resistance also depends on the nature of the â¦ 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. It means if the resistance of the material of the conductor is 100 Ω, then the conductance will be 1/100 Ω. Understand the various factors affecting the resistance by watching the video below. Disadvantages of series arrangement of resistors. 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. Now please don't get me wrong: if you want to buy a shed (a 'Class 10' shed building) and then convert in into a house or liveable dwelling (a 'Class 1' or 'Class â¦ The resistance of a conductor is inversely proportional to its area of cross-section. unit of charge is coulomb. Calculating the effective resistance/total resistance of series circuits: The total resistance/effective resistance of the circuit is found by simply adding up the resistance values of the individual . Q5. Check you answers with answer keys provided. Tungsten has low resistivity,does not burn even at higher temperature(melting point is very high), 3) Heating elements of electrical appliances like electric iron,heater,toaster,immersion rod are made of nichrome (alloy of Ni,Cr,Fe,Mn). Class-10 Goyal Brothers Electric Circuit, Resistance and Ohmâs Law ICSE Physics Solutions Ch-8 .We Provide Step by Step Answer of Exercise, MCQs, Numerical Problem Questions of Exercise-1 Goyal Brothers Electric Circuit, Resistance and Ohmâs Law ICSE Class-10 .Visit official Website CISCE for detail information about ICSE Board Class-10 â¦ 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. Resistance definition, the act or power of resisting, opposing, or withstanding. The reason behind this is the electron movement from the conduction band to the valence band increases as the energy gap between these two bands is large. Connect wire B between the terminal,note ammeter reading. In the next few sections, let us study electrical resistance in detail. ... A current of 2 A passes through a conductor and produces 80 joules of heat in 10 seconds. Class 10 Science Chapter 12 Extra Questions and Answers Electricity. In series combination. Melting point is high or does not burn at higher temperature. 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. In this video, I have explained about the resistance in the electric circuits in depth from chapter-12 class 10 CBSE NCERT. Il primo corrisponde al carico di rottura nominale diviso 100, mentre il secondo è il rapporto tra il carico di snervamento e il carico di rottura, moltiplicato per 10. The Questions and Materials having resistivity in the range of 10 â8 Î© m to 10 â¦ According to Ohm’s law, there is a relation between the current flowing through a conductor and the potential difference across it. What happens to the resistance of insulators with an increase in temperature? Factors Affecting Resistance. When a 12 V battery is connected across an unknown resistor, there is a current of 2.5 mA in the circuit. The resistance of a System of Resistors. What ... What will be the length of this wire to make its resistance 10 Ω? 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. Resistance and Resistivity. Here we have given Rajasthan Board RBSE Class 10 Science Solutions Chapter 10 Electricity Current. The SI unit of electrical resistivity is ohms.metre. How can we decrease the resistance of a wire by a factor of 2? Resistance of a conductor depends: On its length; On its area of cross-section; On the nature of its material . What is the effective resistance between the two points at the end of any diameter of the circle? Overview. Then effective resistance, Q. The electrodes can get very hot. The resistance class is composed by two numbers, divided by a dot. Electrical resistance is also known as specific electrical resistance. RBSE Solutions for Class 10 Science Chapter 10 Electricity Current are part of RBSE Solutions for Class 10 Science. The inverse quantity refers to the electrical conductance. What is effective resistance? Learn Videos. S.I. Equivalent series resistance between A and B, R, = 2+2 = 4 Ω 2) Resistance of a conductor is inversely proportional to area of cross section. Sep 30,2020 - What is a resistance? Resistance (R) of a copper wire of length l and cross-section A is given by the expression, Where, Resistivity of copper, Area of cross-section of the wire, A = Diameter= 0.5 mm = 0.0005 m. Resistance, R = 10 Ω. Electric resistivity is defined as the electrical resistance offered per unit length and unit cross-sectional area at a specific temperature and is denoted by ρ. When an electric current of one ampere passes through a â¦ In practical applications, resistors are used to increase or decrease the electric current. Q. 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? So far, you have read about various factors which affect electric current. 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). Question 3 On what factors does the resistance of a conductor depends? The two 10 resistors are connected in series and they are parallel to the 5 resistor.The equivalent resistance, Subject. 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. The distance of image from the mirror is (a) -30 cm (b) 30 cm (c) 10 cm (d) -10 cm. The measure of a materialâs ability to oppose current flow is also known as the resistivity, p of the material. Q. It is given by. Therefore, resistivity is proportional to the cross-sectional area. 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. (ii) Only diameter of the wire is doubled? Required fields are marked *. What is Resistance? Answers are according to the marks of the questions. Name the factor that would reduce the resistance through an electric cord. Question 5 WhyÂ Filament of an electric bulb is made up of tungsten metal? See more. Class 10. So far, you have read about various factors which affect electric current. The electrical resistance measures how much the flow of this, Difference Between Resistance And Resistivity. | EduRev Class 10 Question is disucussed on EduRev Study Group by 195 Class 10 Students. Sep 02,2020 - If a wire is increased by 20% .what is resistance? what is resistance in physics class 10 . (Some resistance brazes are 10 - 20 seconds or longer - not cycles. Materials with a low value of resistivity conduct electricity very well. This video is highly rated by Class 10 students and has been viewed 8885 times. Resistance is a measure of how much a component or material resists the flow of electricity through it, measured in ohms. Class. Calculate the value of each resistance. Given below are the Class 10 Science Solved Numerical Questions for electricity a. Concepts questions b. Calculation/Numerical problems c. Multiple choice questions d. Long answer questions e. Fill in the blanks Question 1 A wire of length 3 m and area of cross-section 1.7 × 10-6 m 2 has a resistance 3 × 10-2 ohm. Hence, length of the wire, If the diameter of the wire is doubled, new diameter . (b) S.I. The two 10 resistors are connected in series and they are parallel to the 5 resistor.The equivalent resistance, Subject. 9 min. Resistivity of a conductor is defined as resistance of the conductor of unit length and unit area of cross-section. Electrical resistance is defined as the property of an electrical component to resist the flow of electric current. The resistance, R of the eureka wire is the highest whereas the resistance, R of the copper wire is the lowest. Dec 25, 2020 - Fun Video: What is Electric Current (Ohm's law, Resistance and Power) Class 10 Video | EduRev is made by best teachers of Class 10. If the resistance braze generates large amounts of heat for a long time. copper wire (B)=length (l),area of cross section is more than X. Resistance of a conductor is directly proportional to its length R ∝ l if we increase the length of a wire (conductor),its resistance increases(and hence less current can pass through it) If we reduce length,resistance decreases (and hence more current can pass through it) What happens to the resistance of pure metals with an increase in temperature? Pre Boards. class 2: LIMITED RESISTANCE The materials belonging to this class … Resistance (R) of a copper wire of length l and cross-section A is given by the expression, Where, Resistivity of copper, Area of cross-section of the wire, A = Diameter= 0.5 mm = 0.0005 m. Resistance, R = 10 Î©. Reading of ammeter in second case is more that of reading in 1st case. CBSE Ncert Notes for Class 10 Physics Electricity. You also read about the factors which affect the resistance of a conducting wire. Practice to excel and get familiar with the paper pattern and the type of questions. | CBSE Class 10 Science | Chapter12 | Electricity | By Shruti Academy . 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’. Class. 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. 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. The unit of electrical resistance is ohms. 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 The resistance â¦ The other â¦ Name the materials having resistance almost equal to zero. It is given by the following relation. Justify your answer. 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. Why are copper and aluminium wires usually employed for electricity â¦ In this process when electrons collide with positive ions , few electrons drift away and do not â¦ a)Resistivity of Cu and Al is low(act as a good conductor). If the Class 2 is struggling (excessive wear and sticking) then turn to the refractory faced electrodes Group B, Class 10 – 14. Resistance and Resistivity. You also read about the factors which affect the resistance of a conducting wire.