Class 10 Resistance of a System of Resistors. (ii) Only diameter of the wire is doubled? 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 … The electrical resistance of a circuit is the ratio between the voltage applied to the current flowing through it. 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). Find the equivalent resistance of the combination. 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'. (a) Potential difference is measured by voltmeter. If the resistance braze generates large amounts of heat for a long time. 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. Factors Affecting Resistance. Resistivity of a conductor is defined as resistance of the conductor of unit length and unit area of cross-section. Factors Affecting Resistance. Answer. How would the resistance of the wire change when: (i) Only length of the wire is doubled? Class. Resistance has an application in protecting the circuit from high current flow. The unit of electrical resistance is ohm which is defined as volt per ampere. But there is a very basic difference between resistance and resistivity. Unfortunately, this is not correct. Answer: Let R 1 and R 2 be the two resistances, Ans: The reciprocal of resistivity is conductivity. The other … Your email address will not be published. Q2.What happens to the resistivity if resistance and length are constant and the cross-sectional area is doubled? ... Resistance, \(\mathrm{R} \alpha \frac{1}{\mathrm{A}}\). a. Ans: As the temperature increases, the resistance of pure metals increase. The resistivities of a few materials are given below for a comparison. Overview. 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: . resistors. Question 1 A piece of wire is redrawn  by pulling it until its length is doubles.Compare the new resistance with the original value? Practice to excel and get familiar with the paper pattern and the type of questions. Q8. (a) Nichrome wire of length ‘l’ and radius ‘r’ has resistance of 10 Ω. Disadvantages of series arrangement of resistors. The resistance of a System of Resistors. Ans: As we know that \(\rho =\frac{E}{J}\). You also read about the factors which affect the resistance of a conducting wire. 1. 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. Sep 02,2020 - If a wire is increased by 20% .what is resistance? Learn Videos. The resistance of a System of Resistors. Slope indicates Resistance ∴ Resistance of the resistor = 3.4Ω. A wire of resistance 10 ohm is bent in the form of a closed circle.

Offered for classes 6-12, LearnNext is a popular self-learning solution for students who strive for excellence. 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. 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. Pre Boards. Specific resistance or resistivity (ρ), 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 … 2. Understand the various factors affecting the resistance by watching the video below. Question 1. CBSE Ncert Notes for Class 10 Physics Electricity. Q1. It is given by. An object is placed at a distance of 10 cm in front of a concave mirror. Last Updated on May 4, 2020 By Mrs Shilpi Nagpal Leave a Comment. VERY SHORT ANSWER TYPE QUESTIONS [1 Mark] Q. 1) Connecting wires in electric circuit are made up of Cu and Al. Equivalent series resistance between A and B, R, = 2+2 = 4 Ω 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. Following is the formula of electrical resistivity: Interested to learn more about the difference, below is the link: Difference Between Resistance and Resistivity. 2. Learn more about other related concepts with the help of engaging video lessons by visiting BYJU’S, Your email address will not be published. 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 (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. A material whose resistivity is low is a good conductor ie low resistivity means less resistance to flow of current. 1. unit of charge is coulomb. Class 10 Science Chapter 12 Board Questions of Electricity. 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 … ICSE Class 10. class 2: LIMITED RESISTANCE The materials belonging to this class … In this process when electrons collide with positive ions , few electrons drift away and do not … 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. Resistance and Resistivity. Ans: The unit of resistivity is given as Ohm-metre. Class 10 Science Electricity Short Answer Type Questions[l] [2 Marks] – Year 2011. Resistance of a conductor depends: On its length; On its area of cross-section; On the nature of its material . Question 5 Why Filament of an electric bulb is made up of tungsten metal? Resistance of second wire is double than 1st wire. Why are copper and aluminium wires usually employed for electricity … 2) Filament of an electric bulb is made up of tungsten metal. Resistance definition, the act or power of resisting, opposing, or withstanding. 2) Resistance of a conductor is inversely proportional to area of cross section. If the resistance braze generates large amounts of heat for a long time. Q. The two 10 resistors are connected in series and they are parallel to the 5 resistor.The equivalent resistance, Subject. See more. So far, you have read about various factors which affect electric current. La classe di resistenza è composta da due numeri divisi da un punto. therefore by solving for resistivity we get. Since A is doubled, keeping resistance and length constant, resistivity will also be doubled. Resistors in series. 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. The Questions and Materials having resistivity in the range of 10 −8 Ω m to 10 … I have seen some over one minute long.) Resistivity is a qualitative measurement of a material’s ability to resist flowing electric current. What is Resistance? Two resistance when connected in parallel give resultant value of 2 Ω. RBSE Solutions for Class 10 Science Chapter 10 Electricity Current are part of RBSE Solutions for Class 10 Science. Reading of ammeter in second case is more that of reading in 1st case. S.I. What is Resistance? 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. Term which is defined as volt per ampere is a current of 2.5 mA in the of... *, electric charge flows easily through some materials than others have given Board. That would reduce the resistance of a circuit is the resistivity of Cu and is... Three equal parts and connected in parallel with the original value of 2.5 mA in the of! As a speed breaker to the cross-sectional area resistance measures how much the! Second wire is doubled, new resistance is ohm which is the resistivity of a conductor also upon! A conducting wire of 2.5 mA in the circuit remains the same Let us Study electrical is! 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