Resistivity is different in copper,Iron etc because of their nature,but if we change the shape,only resistance will change. The resistivities of a few materials are given below for a comparison. 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©. Unfortunately, this is not correct. NCERT Solutions for Class 10 Science Electricity Questions and Answers Intext Questions Page Number - 200 Q1. How would the resistance of the wire change when: (i) Only length of the wire is doubled? 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¦ Reading of ammeter in second case is more that of reading in 1st case. 2. Resistance is a measure of how much a component or material resists the flow of electricity through it, measured in ohms. 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Ans: The reciprocal of resistivity is conductivity. 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. CHEMICAL RESISTANCE GUIDE CHEMICAL RESISTANCE GUIDE Chemical Resistance Classes Three different classes of chemical resistance degree are conventionally used: class 1: HIGH RESISTANCE The materials belonging to this class are completely resistant against the conveyed fluid according to the specified operating conditions. If the resistance braze generates large amounts of heat for a long time. (d) S.I. The current flow increases, the resistance acts as a speed breaker to the accelerated car (high current flow). The time will be 1/10 hr. VERY SHORT ANSWER TYPE QUESTIONS [1 Mark] Q. According to Ohm’s law, there is a relation between the current flowing through a conductor and the potential difference across it. 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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. Class 10 Science Home Page. a. For Example: Silver has lowest resistivity and is the best conductor. 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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. The electrical resistance of an object refers to the measure of its opposition to the flow of electric current. Obviously, insulators will have a higher value of resistivity than that of conductors. Answer: Let R 1 and R 2 be the two resistances, The resistance of a System of Resistors. ICSE Class 10. CBSE Ncert Notes for Class 10 Physics Electricity. See more. Overview. It means if the resistance of the material of the conductor is 100 Ω, then the conductance will be 1/100 Ω. It is given by. Pre Boards. where ρ is the resistivity of the material (measured in Ωm, ohm meter). a)Resistivity of Cu and Al is low(act as a good conductor). Class 10 Physics Electricity: Factors on which Resistance depends: Factors on which Resistance depends. copper wire (B)=length (l),area of cross section is more than X. Resistance of second wire is double than 1st wire. Following is the formula of electrical resistivity: Interested to learn more about the difference, below is the link: Difference Between Resistance and Resistivity. (a) Potential difference is measured by voltmeter. 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. Understand the various factors affecting the resistance by watching the video below. unit of current is ampere. Q3. We hope the given RBSE Solutions for Class 10 Science Chapter 10 Electricity Current will help you. ... A current of 2 A passes through a conductor and produces 80 joules of heat in 10 seconds. 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. PREVIOUS NEXT. What is effective resistance? 6 min. Find the equivalent resistance of the combination. If the resistance braze generates large amounts of heat for a long time. Resistivity is a qualitative measurement of a material’s ability to resist flowing electric current. The resistance â¦ Class 10 Resistance of a System of Resistors. Ans: As we know that \(\rho =\frac{E}{J}\), therefore by doubling the cross-sectional area, resistance can be decreased by a factor of 2. | EduRev Class 10 Question is disucussed on EduRev Study Group by 195 Class 10 Students. 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. La classe di resistenza è composta da due numeri divisi da un punto. (ii) Only diameter of the wire is doubled? The SI unit of electrical resistivity is ohms.metre. 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. CBSE Class 10 Science Practicals Lab Manual MCQ Ðnswers: Physics Lab Manual CBSE Class 10 Scoring Key With Explanation (b) Ammeter measures current. Equivalent series resistance between A and B, R, = 2+2 = 4 Ω The resistance, R of the eureka wire is the highest whereas the resistance, R of the copper wire is the lowest. Class-10 Goyal Brothers Electric Circuit, Resistance and Ohmâs 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 Ohmâs Law ICSE Class-10 .Visit official Website CISCE for detail information about ICSE Board Class-10 â¦ Class 10 Physics Electricity: Resistors in series: Resistors in series. HUMAN EYE AND THE COLOURFUL WORLD. ... Resistance, \(\mathrm{R} \alpha \frac{1}{\mathrm{A}}\). 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 . KSEEB SSLC Class 10 Science Solutions Chapter 12 Electricity are part of KSEEB SSLC Class 10 Science Solutions. PREVIOUS NEXT. The distance of image from the mirror is (a) -30 cm (b) 30 cm (c) 10 cm (d) -10 cm. Hence, length of the wire, If the diameter of the wire is doubled, new diameter . 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).