Ans: The unit of resistivity is given as Ohm-metre. 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. Equivalent resistance of the circuit is the sum of individual resistances. | EduRev Class 10 Question is disucussed on EduRev Study Group by 195 Class 10 Students. Therefore, the total resistance of the circuit is given by Thus, 1 A current will flow through 10 Ω resistor and 1 A will flow through the lamp and conductor of 5 Ω resistance. Ans: As the temperature increases, the resistance of pure metals increase. It means if the resistance of the material of the conductor is 100 Ω, then the conductance will be 1/100 Ω. Learn Videos. 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? What is effective resistance? The electrical resistance of a circuit is the ratio between the voltage applied to the current flowing through it. The two 10 resistors are connected in series and they are parallel to the 5 resistor.The equivalent resistance, Subject. A wire of resistance 10 ohm is bent in a closed circle. The two 10 resistors are connected in series and they are parallel to the 5 resistor.The equivalent resistance, Subject. Calculate the value of each resistance. 4) Insulators are used to protect ourselves from severe shock of electric current. Therefore, resistivity is proportional to the cross-sectional area. Class 10 Resistance of a System of Resistors. The resistivities of a few materials are given below for a comparison. Learn Videos. Resistors in series. All the questions are divided into 1 mark, 2 marks, 3 marks and 5 marks questions. Your email address will not be published. Physics. HUMAN EYE AND THE COLOURFUL WORLD. 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) Economics Chapter 4 Globalisation and The Indian Economy – Notes & Study Material, वाक्य और वाक्य के भेद, Economics Chapter 3 Money and Credit – 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. When connected in series, the value becomes 9 Ω. Ans: As we know that \(\rho =\frac{E}{J}\). Q1. 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? Resistance. ... A current of 2 A passes through a conductor and produces 80 joules of heat in 10 seconds. Q2.What happens to the resistivity if resistance and length are constant and the cross-sectional area is doubled? Resistance of uniform metallic conductor is directly proportional to its length and inversely proportional to area of … Therefore, conductance increases and the resistance decreases. What ... What will be the length of this wire to make its resistance 10 Ω? The other … Class 10. S.I. 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. Resistance has an application in protecting the circuit from high current flow. Q. 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). Class 10 Science Home Page. Class. Check you answers with answer keys provided. (a) Potential difference is measured by voltmeter. Name the factor that would reduce the resistance through an electric cord. NCERT Solutions for Class 10 Science Electricity. The unit of electrical resistance is ohm which is defined as volt per ampere. Pre Boards. ICSE Class 10. The Questions and Materials having resistivity in the range of 10 −8 Ω m to 10 … What is Resistance? Resistance is a property of conductor due to which it resists the flow of electric current through it. 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. unit of charge is coulomb. What is Resistance? NCERT Solutions for Class 10 Science Electricity Questions and Answers Intext Questions Page Number - 200 Q1. ICSE Class 10. A wire of resistance 10 ohm is bent in the form of a closed circle. Q7. Question 2 How is the resistivity of a material related to the use of that material? Resistivity does not depend on l and A but on nature of material of which substance is made of. Class. How are given resistances connected so that equivalent resistance is increased? According to Ohm’s law, there is a relation between the current flowing through a conductor and the potential difference across it. Slope indicates Resistance ∴ Resistance of the resistor = 3.4Ω. 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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. 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. 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. Q5. 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 resistor is a electrical componet with a predetermined electrical resistance, like 1 ohm, 10 ohms 100 ohms 10000 ohms etc. unit of charge … 6 min. Required fields are marked *, Electric charge flows easily through some materials than others. Ans. It is given by. Q8. unit of current is ampere. Resistance and Resistivity. A material whose resistivity is low is a good conductor ie low resistivity means less resistance to flow of current. 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. 2) Resistance of a conductor is inversely proportional to area of cross section. Therefore, resistance What is effective resistance? Resistance refers to a measure of the opposition to current flow in a particular electrical circuit. You also read about the factors which affect the resistance of a conducting wire. 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. Equivalent series resistance between A and B, R, = 2+2 = 4 Ω 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 due to collision is the resistance.More the collision suffered by electron in a conductor,more is the resistance. Reading of ammeter in second case is half that of reading in 1st case. Between A and B, the series combination of two resistors of resistances 2 ohm each is connected in parallel with the 1 ohm resistor.:. a. Learn more about other related concepts with the help of engaging video lessons by visiting BYJU’S, Your email address will not be published. Resistance definition, the act or power of resisting, opposing, or withstanding. 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. KSEEB SSLC Class 10 Science Solutions Chapter 12 Electricity are part of KSEEB SSLC Class 10 Science Solutions. The factors which affect electric current through it reason behind this is the resistivity of a conductor inversely. The circle in these sections, we discussed … what is resistance class 10 is resistance |. Important Questions Short Answer Type Questions [ l ] [ 2 marks, 3 marks and 5 marks Questions its. Parts and connected in series, the resistance of insulators decreases ) Filament of electric... < p > Offered for classes 6-12, LearnNext is a electrical componet with low... 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