A wire of resistance 10 ohm is bent in the form of a closed circle. These questions are useful for CBSE Board Examination preparation and practicing to class tests. An object is placed at a distance of 10 cm in front of a concave mirror. 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. The current flow increases, the resistance acts as a speed breaker to the accelerated car (high current flow). What is the effective resistance between the two points at the end of any diameter of the circle? If the resistance braze generates large amounts of heat for a long time. So far, you have read about various factors which affect electric current. Therefore, resistance All the questions are divided into 1 mark, 2 marks, 3 marks and 5 marks questions. What happens to the resistance of pure metals with an increase in temperature? The distance of image from the mirror is (a) -30 cm (b) 30 cm (c) 10 cm (d) -10 cm. class 2: LIMITED RESISTANCE The materials belonging to this class … Class 10. Electricity Class 10 Important Questions Very Short Answer Type Question 1. In this process when electrons collide with positive ions , few electrons drift away and do not â¦ The electrical resistance of a circuit is the ratio between the voltage applied to the current flowing through it. Therefore, conductance increases and the resistance decreases. ICSE Class 10. 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. ... A current of 2 A passes through a conductor and produces 80 joules of heat in 10 seconds.

Resistivity is different in copper,Iron etc because of their nature,but if we change the shape,only resistance will change. Question 2 How is the resistivity of a material related to the use of that material?

Offered for classes 6-12, LearnNext is a popular self-learning solution for students who strive for excellence. 9 min. Electrical resistance is defined as the property of an electrical component to resist the flow of electric current. (Some resistance brazes are 10 - 20 seconds or longer - not cycles. Class. Q7. Physics. The two 10 resistors are connected in series and they are parallel to the 5 resistor.The equivalent resistance, Subject. The SI unit of electrical resistivity is ohms.metre. Class 10. Component that is used to resist the flow of electric current in a circuit is called resistor. Learn Videos. The measure of a materialâs ability to oppose current flow is also known as the resistivity, p of the material. Melting point is high or does not burn at higher temperature. Resistivity of a conductor is defined as resistance of the conductor of unit length and unit area of cross-section. Sep 02,2020 - If a wire is increased by 20% .what is resistance? If the Class 2 is struggling (excessive wear and sticking) then turn to the refractory faced electrodes Group B, Class 10 â¦ La classe di resistenza è composta da due numeri divisi da un punto. 4) Insulators are used to protect ourselves from severe shock of electric current. Between A and B, the series combination of two resistors of resistances 2 ohm each is connected in parallel with the 1 ohm resistor.:. Resistance of second wire is double than 1st wire. 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. Obviously, insulators will have a higher value of resistivity than that of conductors. 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 electrical resistance of an object refers to the measure of its opposition to the flow of electric current. 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. Electrical resistance is also known as specific electrical resistance. It forms a real image three times larger than the object. 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. unit of charge â¦ Check you answers with answer keys provided. The other â¦ A wire of resistance 10 ohm is bent in a closed circle. Resistance has an application in protecting the circuit from high current flow. 33.A 9Î© resistance is cut into three equal parts and connected in parallel. HUMAN EYE AND THE COLOURFUL WORLD. Resistance is a property of conductor due to which it resists the flow of electric current through it. Ans: The reciprocal of resistivity is conductivity. Q1. Question 4 Why connecting wires in an electric circuit are made of Cu and Al? Calculate the value of each resistance. KSEEB SSLC Class 10 Science Solutions Chapter 12 Electricity are part of KSEEB SSLC Class 10 Science Solutions. What is effective resistance? Conductor The movement of electron gives rise to the flow of current through metals Connect wire B between the terminal,note ammeter reading. 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. Q3. When an electric current of one ampere passes through a â¦ I have seen some over one minute long.) 1. Resistivity does not depend on l and A but on nature of material of which substance is made of. So, new resistance is (1/16)th of original resistance. ... Resistance, $$\mathrm{R} \alpha \frac{1}{\mathrm{A}}$$. Q33. Hence, length of the wire, If the diameter of the wire is doubled, new diameter . The resistance class is composed by two numbers, divided by a dot. Finally, resistance of a piece of wire depends on its temperature also. ICSE Class 10. How much does the resistance change if the diameter is doubled? The time will be 1/10 hr. 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. Class 10 Science Electricity Short Answer Type Questions[l] [2 Marks] â Year 2011. 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. How are given resistances connected so that equivalent resistance is increased? 6 min. resistors. Overview. Reading of ammeter in second case is half that of reading in 1st case. Answer: Let R 1 and R 2 be the two resistances, Overview. Ans: As the temperature increases, the resistance of pure metals increase. [CBSE 2010] Ans. The first corresponds to the nominal For Example: Silver has lowest resistivity and is the best conductor. The resistivities of a few materials are given below for a comparison. Ans: As we know that $$\rho =\frac{E}{J}$$. 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. 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'. PREVIOUS NEXT. We hope the given RBSE Solutions for Class 10 Science Chapter 10 Electricity Current will help you. (b) S.I. CBSE Class 10 Science Practicals Lab Manual MCQ Ðnswers: Physics Lab Manual CBSE Class 10 Scoring Key With Explanation (b) Ammeter measures current. 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’. In this video, I have explained about the resistance in the electric circuits in depth from chapter-12 class 10 CBSE NCERT. You also read about the factors which affect the resistance of a conducting wire. | EduRev Class 10 Question is disucussed on EduRev Study Group by 189 Class 10 Students. 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. Factors on which resistance of a conductor depends: 1) Resistance of a conductor is directly proportional to length. Q5. NCERT Solutions for Class 10 Science Electricity. 2) Filament of an electric bulb is made up of tungsten metal. Why are copper and aluminium wires usually employed for electricity â¦ Resistance definition, the act or power of resisting, opposing, or withstanding. 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. So far, you have read about various factors which affect electric current. In series combination. The resistance â¦ unit of current is ampere. A resistor is a electrical componet with a predetermined electrical resistance, like 1 ohm, 10 ohms 100 ohms 10000 ohms etc. Pre Boards. 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. Resistance of uniform metallic conductor is directly proportional to its length and inversely proportional to area of â¦ Answers are according to the marks of the questions. Sin categoría ... Resistance is the term which is the resisting of flowing of charges from a specific substance of any size. The electrodes can get very hot. CBSE Ncert Notes for Class 10 Physics Electricity. In these sections, we discussed simple circuits. Your email address will not be published. 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. 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¦ A material whose resistivity is low is a good conductor ie low resistivity means less resistance to flow of current. Materials with a low value of resistivity conduct electricity very well. PREVIOUS NEXT. When connected in series, the value becomes 9 Ω. The electrodes can get very hot. Last Updated on May 4, 2020 By Mrs Shilpi Nagpal Leave a Comment. Unfortunately, this is not correct. The inverse quantity refers to the electrical conductance. The unit of electrical resistance is ohms. copper wire (B)=length (l),area of cross section is more than X. Q8. It is given by. Equivalent series resistance between A and B, R, = 2+2 = 4 Ω 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¦ Resistance of a conductor depends: On its length; On its area of cross-section; On the nature of its material . Pre Boards. What happens to the resistance of insulators with an increase in temperature? The reason behind this is the increase in the number of electrons in the conduction band which reduces the mobility thereby increasing the resistance. The resistance of a System of Resistors. Learn more about other related concepts with the help of engaging video lessons by visiting BYJU’S, Your email address will not be published. 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. See more. Resistivity is a qualitative measurement of a material’s ability to resist flowing electric current. Resistance. If the Class 2 is struggling (excessive wear and sticking) then turn to the refractory faced electrodes Group B, Class 10 – 14. 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? When two or more resistors are connected in series: The current through the circuit remains the same. Here we have given Rajasthan Board RBSE Class 10 Science Solutions Chapter 10 Electricity Current. Resistance and Resistivity. Resistance is a measure of how much a component or material resists the flow of electricity through it, measured in ohms. This video is highly rated by Class 10 students and has been viewed 8885 times. (ii) Only diameter of the wire is doubled? Class 10 Science Home Page. Your email address will not be published. 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. The resistance of a System of Resistors. 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. Ans. Resistance of a conductor also depends upon nature of material of conductor,temperature of conductor. 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. Check you answers with answer keys provided. The resistance of a conductor is inversely proportional to its area of cross-section. CBSE Class 10 Science Practicals Lab Manual Questions Question 1: If two resistors having resistances of 3 Î©, and 6 Î©, respectively are connected in parallel, what will be the net resistance in the circuit? 2. Q1. | CBSE Class 10 Science | Chapter12 | Electricity | By Shruti Academy . Therefore, resistance You also read about the factors which affect the resistance of a conducting wire. 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) Question 10. 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). I have seen some over one minute long.) Resistors in series. Justify your answer. 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: . | 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. Disadvantages of series arrangement of resistors. Answer. 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. 9 min. 6 min. 2. | CBSE Class 10 Science | Chapter12 | Electricity | By Shruti Academy . (d) S.I. Class. NCERT Solutions for Class 10 Science Electricity Questions and Answers Intext Questions Page Number - 200 Q1. Physics. 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¦ The two 10 resistors are connected in series and they are parallel to the 5 resistor.The equivalent resistance, Subject. It is given by the following relation. Factors Affecting Resistance. When a potential difference (acceleration) is applied across the conductor (to car), the electrons start moving from negative to positive electrode). | 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. 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. If the resistance braze generates large amounts of heat for a long time. (ii) Now, a resistance of 10 Î© is connected in parallel with the series combination. a)Resistivity of Cu and Al is low(act as a good conductor). Answer: Given: p = 1.60 × 10-6 Î© m, l = 10 m and A = 2 x 10-3 m 2 Resistance, Question 22. 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. In practical applications, resistors are used to increase or decrease the electric current. Class 10 Resistance of a System of Resistors. What is Resistance? unit of resistance is ohm. Resistance refers to a measure of the opposition to current flow in a particular electrical circuit. Resistance of a conductor is inversely proportional to area of cross sectionÂ. Required fields are marked *. 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 Q2.What happens to the resistivity if resistance and length are constant and the cross-sectional area is doubled? Find the equivalent resistance of the combination. Required fields are marked *, Electric charge flows easily through some materials than others. Class 10 Physics Electricity: Factors on which Resistance depends: Factors on which Resistance depends. But there is a very basic difference between resistance and resistivity. 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. It means if the resistance of the material of the conductor is 100 Ω, then the conductance will be 1/100 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. Name the factor that would reduce the resistance through an electric cord. So, R 1 = R 2 = 5 ohm, form a parallel loop. Question 1. | 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 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 … Since A is doubled, keeping resistance and length constant, resistivity will also be doubled. Two resistance when connected in parallel give resultant value of 2 Ω. According to Ohm’s law, there is a relation between the current flowing through a conductor and the potential difference across it. Question 8. The resistance, R of the eureka wire is the highest whereas the resistance, R of the copper wire is the lowest. Slope indicates Resistance â´ Resistance of the resistor = 3.4Î©. Factors Affecting Resistance. Learn Videos. therefore by solving for resistivity we get. a. The higher the temperature the higher is the resistance. Your email address will not be published. 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. 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). RBSE Solutions for Class 10 Science Chapter 10 Electricity Current are part of RBSE Solutions for Class 10 Science. 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