Ano ang Imahinasyong guhit na naghahati sa daigdig sa magkaibang araw? Resistance is the characteristic of a material which opposes the flow of electric current. Copyright © 2020 Multiply Media, LLC. There are two possible combinations of resistance in electric circuits: In series combinations, resistors are connected end to end and electric current has a single path through the circuit. The formula is: The unit of conductance is the Siemens, abbreviated S.Foe example, the conductance of a 22KΩ resister is G=1/22KΩ=45.5µs. This restriction varies and is determined by the type of material.

Available for CBSE, ICSE and State Board syllabus. The materials are divided into different categories like insulators, conductor and semiconductors etc. List of Factors affecting resistance. As a result, the wire becomes thin due to stretching. Electrical resistance also depends on temperature. What are insulators?

The resistivity of a material depends on its nature and the temperature of the conductor, but not on its shape and size.
Nature of material Submitted to : Mr. Rajesh Kaurav Submitted by : Harsh Solanki [class- 12th ] 2. Therefore, R = ρ(l  / A),ρ(rho) is constant of proportionality. Define resistivity and state its SI unit. See also: Difference between Voltage and current. See Also: Types of electric charge What is the unit of resistance? How much does does a 100 dollar roblox gift card get you in robhx? when the length is doubled of a conductor the resistivity does not change since it does not depend on the length of the conductor and depends only on the nature of material.

lenght and breadth of the electric conductor. The unit of ρ is ohm-meter (Ωm).Below given table of some metals with specific resistance: What are conductors? They are tightly bound inside atoms. The resistance of a wire depends both on the cross-sectional area and length of the wire and on the nature of the material of the wire. R∝ 1/A . Factors on which Resistance depends. Available for CBSE, ICSE and State Board syllabus. Ano ang pinakamaliit na kontinente sa mundo? What are the 4 factors that affect resistance?
what is superconductor? Your email address will not be published. There are four factors on which resistance depends. So its area of cross section will be halved(Since the volume remains constant). The number of current paths is equal to the number of parallel branches. hat are the factors on which the resistance of a conductor depends? Resistance decreases with an increase in temperature. Resistance is the property of the material that restricts the flow of electrons. What is the time signature of the song Atin Cu Pung Singsing? The thermistor is used in a circuit that senses temperature change.

It can be expressed as. It depends on the intermolecular structure of the individual material.

Who is the longest reigning WWE Champion of all time? We have received your request successfully. There are four factors on which resistance depends. How many Types of Multivibrators Are There? Therefore, wire, which typically has a very small resistance, becomes warm when there is sufficient current through it. Satya Prakash Public School Physics Project Topic : Study of various factors on which the b internal resistance/EMF of a cell b b depends. A parallel circuit provides more than one path for current. A greater number of resistors connected in series creates more opposition to current.

Click hereto get an answer to your question ️ (a) On which factors does the resistance of a conductor depend?

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Since Vs is the voltage across each of the parallel resistors in the above figure, by Ohm’s law I=Vs/R: The term Vs can be factored out of the right side of the equation and canceled with Vs on the left side, leaving only the resistance terms. Thus, every time a resistor is added in series, the total resistance increases. So new resistance RN = ρ 2L/A/2 = 4. ρ.L/A =4R According to ohm’s law at constant temperature potential difference is directly proportional to electric current. The resistance of a given object depends primarily on two factors: What material it is made of, and its shape. R = k* L/A Resistance is defined as the opposition to the flow of electrical current through a conductor. The current through each resistor in a series circuit is the same as the current through all the resistors that are in series with it. A parallel circuit is one more that has more than one branch. What is the distance between the Earth and the Sun in km? What do you mean by Thermal conductivity? The thermistor is a temperature-dependent resistor and its resistance decreases as temperature rises. Cross Sectional: Resistance of a conductor decreases in increasing the cross sectional area. The resistivity of a material is the resistance of a wire of that material of unit length and unit cross-sectional area. Why don't libraries smell like bookstores? Pagkakaiba ng pagsulat ng ulat at sulating pananaliksik? Ano ang mga kasabihan sa sa aking kababata? Resistence of a conducter depends on the length , nature ,width and type of material used . Temperature Required fields are marked *, On What Factors Does The Resistance Of A Conductor Depend.

Our counselor will call to confirm your booking. These free electrons move randomly in all directions inside metals. It varies for various material. i) Length of the conductor (l) : R is directly proportional to "l", ii) Area of cross -section (A) : R is inversely proportional to "A", What is the anothe name of unit joule/coulomb called, Differentiate between resistor and resistance. What is difference between electric potential and potential difference? Required fields are marked *. A material that does not easily transmit energy, such as electric current or heat is called insulators. Hence the new resistance will become 4 times. The SI unit of electrical resistivity is the ohm⋅metre (Ω⋅m). The resistance of a conductor depends on:-1. This movement of free electrons in a particular direction under the influence of an external field causes the flow of current in metal wires. The resistance R and conductance G of a conductor of uniform cross section, therefore, can be computed as The unit for resistivity is the ohm-metre. Area of cross section

Resistance,R,is expressed in ohms and is symbolized by the Greek letter omega (Ω). We have received your request successfully.

The resistance of an electric circuit can be measured numerically. Nature of material used. Such substances are called superconductors. Copper wire has less resistance thin steel wire of the same size. Resistivity of conductors is very low whereas the insulators have a very high resistivity. The resistivity increases in increasing the temperature of material. For a given material, the resistance is inversely proportional to the cross-sectional area; for example, a thick copper wire has lower resistance than an otherwise-identical thin copper wire. Our counselor will call to confirm your booking.

The resistance of conductors increases with an increase in temperature. In the above figure, three resistors are connected in series to a DC voltage source. Resistance = Potential difference/ Current.

There are four factors affecting resistance which are Temperature, Length of wire, Area of the cross-section of the wire, and nature of the material.

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