The higher the temperature the higher is the resistance. Class 10 Science Electricity Short Answer Type Questions[l] [2 Marks] â Year 2011. Question 4 Why connecting wires in an electric circuit are made of Cu and Al? 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¦ So, new resistance is (1/16)th of original resistance. 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) What is the effective resistance between the two points at the end of any diameter of the circle? unit of current is ampere. 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. Electricity Class 10 Important Questions Short Answer Type II. Ans: The reciprocal of resistivity is conductivity. [CBSE 2010] Ans. Resistance of a conductor is inversely proportional to area of cross sectionÂ. Q. class 2: LIMITED RESISTANCE The materials belonging to this class … 4) Insulators are used to protect ourselves from severe shock of electric current. Factors on which resistance of a conductor depends: 1) Resistance of a conductor is directly proportional to length. Q3. 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. 9 min. If the resistance braze generates large amounts of heat for a long time. 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. The resistance, R of the eureka wire is the highest whereas the resistance, R of the copper wire is the lowest. Class. 2. Your email address will not be published. Required fields are marked *, Electric charge flows easily through some materials than others. Check you answers with answer keys provided. This video is highly rated by Class 10 students and has been viewed 8885 times. 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. In these sections, we discussed â¦ Resistance refers to a measure of the opposition to current flow in a particular electrical circuit. See more. copper wire (B)=length (l),area of cross section is more than X. 9 min. Class 10 Science Chapter 12 Board Questions of Electricity. CBSE Class 10 Science Practicals Lab Manual MCQ Ðnswers: Physics Lab Manual CBSE Class 10 Scoring Key With Explanation (b) Ammeter measures current. In series combination. What is Resistance? Obviously, insulators will have a higher value of resistivity than that of conductors. Answer: Let R 1 and R 2 be the two resistances, Here we have given Rajasthan Board RBSE Class 10 Science Solutions Chapter 10 Electricity 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. 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. Q33. ... Resistance, $$\mathrm{R} \alpha \frac{1}{\mathrm{A}}$$. The unit of electrical resistance is ohms. Learn Videos. VERY SHORT ANSWER TYPE QUESTIONS [1 Mark] Q. Resistance and Resistivity. A wire of resistance 10 ohm is bent in the form of a closed circle. But there is a very basic difference between resistance and resistivity. Physics. Electricity Class 10 Important Questions Very Short Answer Type Question 1. 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¦ | 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 … Check you answers with answer keys provided. Factors Affecting 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. (Some resistance brazes are 10 - 20 seconds or longer - not cycles. Resistance of a conductor depends: On its length; On its area of cross-section; On the nature of its material . (ii) Now, a resistance of 10 Î© is connected in parallel with the series combination. resistors. PREVIOUS NEXT. ICSE Class 10. HUMAN EYE AND THE COLOURFUL WORLD. Q. 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. 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 . Ans: As the temperature increases, the resistance of insulators decreases. Component that is used to resist the flow of electric current in a circuit is called resistor. When a 12 V battery is connected across an unknown resistor, there is a current of 2.5 mA in the circuit. The time will be 1/10 hr. In this video, I have explained about the resistance in the electric circuits in depth from chapter-12 class 10 CBSE NCERT. Pre Boards. Class 10 Science Home Page. The resistance â¦ 1. Overview. What is the reciprocal of resistivity? 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. Sep 30,2020 - What is a resistance? The distance of image from the mirror is (a) -30 cm (b) 30 cm (c) 10 cm (d) -10 cm. Resistance is a measure of how much a component or material resists the flow of electricity through it, measured in ohms. How can we decrease the resistance of a wire by a factor of 2? Ans: As we know that $$\rho =\frac{E}{J}$$. Over one minute long. ρ is the resistance in the circuit remains the same and they parallel! Into 1 Mark ] Q term which is the resistivity If resistance and resistivity large of... Through a conductor and the Type of Questions reduce the resistance of a closed.... A passes through a conductor depends: on its length is doubles.Compare the new resistance is as. 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