The resistance of a System of Resistors. Class 10 Resistance of a System of Resistors. 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. Since A is doubled, keeping resistance and length constant, resistivity will also be doubled. Question 4 Why connecting wires in an electric circuit are made of Cu and Al? What ... What will be the length of this wire to make its resistance 10 Ω? 2) Filament of an electric bulb is made up of tungsten metal. Ans: As the temperature increases, the resistance of pure metals increase. Answer: Given: p = 1.60 × 10-6 Ω m, l = 10 m and A = 2 x 10-3 m 2 Resistance, Question 22. Sin categoría ... Resistance is the term which is the resisting of flowing of charges from a specific substance of any size. Class 10 Science Chapter 12 Board Questions of Electricity. Question 1. Question 8. Q6. Resistance refers to a measure of the opposition to current flow in a particular electrical circuit. Q3. How would the resistance of the wire change when: (i) Only length of the wire is doubled? Class 10 Science Home Page. The two 10 resistors are connected in series and they are parallel to the 5 resistor.The equivalent resistance, Subject. The electrical resistance of an object refers to the measure of its opposition to the flow of electric current. Following is the formula of electrical resistivity: Interested to learn more about the difference, below is the link: Difference Between Resistance and Resistivity. 6 min. Equivalent series resistance between A and B, R, = 2+2 = 4 Ω Pre Boards. Factors Affecting Resistance. NCERT Solutions for Class 10 Science Electricity. If the resistance braze generates large amounts of heat for a long time. Hence, length of the wire, If the diameter of the wire is doubled, new diameter . Ans: The reciprocal of resistivity is conductivity. (Some resistance brazes are 10 - 20 seconds or longer - not cycles. What is Resistance? 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. She has started this educational website with the mindset of spreading Free Education to everyone. If the resistance braze generates large amounts of heat for a long time. Electrical resistance is defined as the property of an electrical component to resist the flow of electric current. The reason behind this is the increase in the number of electrons in the conduction band which reduces the mobility thereby increasing the resistance. If you have any query regarding Rajasthan Board RBSE Class 10 Science Solutions Chapter 10 Electricity Current, drop a comment below and we will get back to you at the earliest. 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 forms a real image three times larger than the object. | 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 … (a) Nichrome wire of length ‘l’ and radius ‘r’ has resistance of 10 Ω. 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). Your email address will not be published. Component that is used to resist the flow of electric current in a circuit is called resistor. unit of charge is coulomb. 2. Electricity Class 10 Important Questions Very Short Answer Type Question 1. An object is placed at a distance of 10 cm in front of a concave mirror. The higher the temperature the higher is the resistance. Finally, resistance of a piece of wire depends on its temperature also. The SI unit of electrical resistivity is ohms.metre.

Offered for classes 6-12, LearnNext is a popular self-learning solution for students who strive for excellence. Required fields are marked *. Therefore, resistance Electricity Class 10 Important Questions Short Answer Type II. (b) S.I. Q. PREVIOUS NEXT. Practice to excel and get familiar with the paper pattern and the type of questions. Therefore, conductance increases and the resistance decreases. Resistance and Resistivity. Question 1 A piece of wire is redrawn  by pulling it until its length is doubles.Compare the new resistance with the original value? Resistance (R) = 9 ohm Length l = 30 cm New Length (l) = 30 cm = 3/l = 10 cm `R=ρ 1/A` New Resistance : With change in length, there will be change in area of cross-section also in the same order. Q1. Required fields are marked *, Electric charge flows easily through some materials than others. copper wire (B)=length (l),area of cross section is more than X. ... A current of 2 A passes through a conductor and produces 80 joules of heat in 10 seconds. Reading of ammeter in second case is more that of reading in 1st case. The time will be 1/10 hr. 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 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. 1. 9 min. 6 min. The electrical resistance of a circuit is the ratio between the voltage applied to the current flowing through it. Resistance and Resistivity. 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 … Find the equivalent resistance of the combination. [CBSE 2010] Ans. 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. NCERT Solutions for Class 10 Science Electricity Questions and Answers Intext Questions Page Number - 200 Q1. A wire of resistance 10 ohm is bent in a closed circle. 2. What is Resistance? 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. Physics. These questions are useful for CBSE Board Examination preparation and practicing to class tests. 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 electrical resistance measures how much the flow of this, Difference Between Resistance And Resistivity. 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. (c) S.I. Class 10 Science Home Page. Equivalent resistance of the circuit is the sum of individual resistances. | 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 resistivities of a few materials are given below for a comparison. According to Ohm’s law, there is a relation between the current flowing through a conductor and the potential difference across it. In these sections, we discussed simple circuits. Ans: As we know that \(\rho =\frac{E}{J}\). In these sections, we discussed … The resistance, R of the eureka wire is the highest whereas the resistance, R of the copper wire is the lowest. Your email address will not be published. Sep 02,2020 - If a wire is increased by 20% .what is resistance? 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. You also read about the factors which affect the resistance of a conducting wire. Q1. I have seen some over one minute long.) This video is highly rated by Class 10 students and has been viewed 8885 times. 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. For Example: Silver has lowest resistivity and is the best conductor. 33.A 9Ω resistance is cut into three equal parts and connected in parallel. 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. Physics. Understand the various factors affecting the resistance by watching the video below. 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 … The current flow increases, the resistance acts as a speed breaker to the accelerated car (high current flow). 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. HUMAN EYE AND THE COLOURFUL WORLD. In this process when electrons collide with positive ions , few electrons drift away and do not … The electrodes can get very hot. 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’. Learn Videos. When a potential difference (acceleration) is applied across the conductor (to car), the electrons start moving from negative to positive electrode). 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. Materials with a low value of resistivity conduct electricity very well. It means if the resistance of the material of the conductor is 100 Ω, then the conductance will be 1/100 Ω. The resistance … ICSE Class 10. La classe di resistenza è composta da due numeri divisi da un punto. It is given by. 1. Overview. Between A and B, the series combination of two resistors of resistances 2 ohm each is connected in parallel with the 1 ohm resistor.:. Class. 2) Resistance of a conductor is inversely proportional to area of cross section. Class 10 Physics Electricity: Factors on which Resistance depends: Factors on which Resistance depends. | EduRev Class 10 Question is disucussed on EduRev Study Group by 189 Class 10 Students. 1) Connecting wires in electric circuit are made up of Cu and Al. Question 5 Why Filament of an electric bulb is made up of tungsten metal? Disadvantages of series arrangement of resistors. The two 10 resistors are connected in series and they are parallel to the 5 resistor.The equivalent resistance, Subject. What is effective resistance? The other … A material whose resistivity is low is a good conductor ie low resistivity means less resistance to flow of current. Q8. So, R 1 = R 2 = 5 ohm, form a parallel loop. What is Resistance? Learn Videos. The unit of electrical resistance is ohm which is defined as volt per ampere. The electrical resistivity of silver is 1.60 × 10-6 Ω m. What will be the resistance of a silver wire of length 10 m and cross-sectional area 2 × 10-3 m2? Then effective resistance, Q. Here we have given Rajasthan Board RBSE Class 10 Science Solutions Chapter 10 Electricity Current. where ρ is the resistivity of the material (measured in Ωm, ohm meter). (Some resistance brazes are 10 - 20 seconds or longer - not cycles. Resistance of a conductor is inversely proportional to area of cross sectionÂ. So far, you have read about various factors which affect electric current. Name the factor that would reduce the resistance through an electric cord. 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 Questions and Materials having resistivity in the range of 10 −8 Ω m to 10 … When connected in series, the value becomes 9 Ω. See more. Ans: As the temperature increases, the resistance of insulators decreases. What is effective resistance? The resistance class is composed by two numbers, divided by a dot. We hope the given RBSE Solutions for Class 10 Science Chapter 10 Electricity Current will help you. Pre Boards. When an electric current of one ampere passes through a … Q. If the Class 2 is struggling (excessive wear and sticking) then turn to the refractory faced electrodes Group B, Class 10 – 14. In this video, I have explained about the resistance in the electric circuits in depth from chapter-12 class 10 … In series combination. 4) Insulators are used to protect ourselves from severe shock of electric current. class 2: LIMITED RESISTANCE The materials belonging to this class … In practical applications, resistors are used to increase or decrease the electric current. unit of charge … Resistance is a measure of how much a component or material resists the flow of electricity through it, measured in ohms. Resistivity of a conductor is defined as resistance of the conductor of unit length and unit area of cross-section. What is the reciprocal of resistivity? Calculate the value of each resistance. unit of current is ampere. Ans: The unit of resistivity is given as Ohm-metre. 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. Electrical resistance is also known as specific electrical resistance. It is given by the following relation. Factors Affecting Resistance. Resistors in series. Check you answers with answer keys provided. Name the materials having resistance almost equal to zero. Check you answers with answer keys provided. So far, you have read about various factors which affect electric current. Resistance is a property of conductor due to which it resists the flow of electric current through it. Answer. VERY SHORT ANSWER TYPE QUESTIONS [1 Mark] Q. | 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. 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