Electric circuits, current, and resistance σ is called electrical conductivity of the materials the resistance of a wire depends on its dimensions. The resistance of a substance depends on the nature of material of the substance the resistance of a substance depends on the temperature of the substance there are mainly four (4) laws of resistance from which the resistivity or specific resistance of any substance can easily be determined. The resistance of a given object depends primarily on two factors: what material it is made of, and its shape 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. Resistivity or resistance of a material depends on the following factors: 1 length of wire = resistance is directly proportional to length 2 area of cross section = resistance is inversely proportional to area of cross section. The electrical resistance of a wire is greater for a longer wire and less for a wire of larger cross sectional area the resistance depend on the material of which it is made and can be expressed as: r = ρ l / a (1.
The resistance of an object depends on its shape and the material of which it is composed the cylindrical resistor in figure 1 is easy to analyze, and, by so doing, we can gain insight into the resistance of more complicated shapes. As shown by the equation, knowing the length, cross-sectional area and the material that a wire is made of (and thus, its resistivity) allows one to determine the resistance of the wire investigate resistors are one of the more common components in electrical circuits. Like the mass, depends on how much of the material is present the relationship between the resistance and the resistivity can be summed up by the following formula. B replace the specimen of wire with another of the same length but different gauge or material c investigate how the current depends on the thickness of the wire, its length and the material from which it is made.
Resistivity and conductivity the electrical resistance of a wire would be expected to be greater for a longer wire, less for a wire of larger cross sectional area, and would be expected to depend upon the material out of which the wire is made. Electricity test grade 6 study 1 a material through which charges cannot flow easily the resistance of a wire depends on the ___ and ___ of the wire, as. - resistance in a wire i have been asked to investigate what factors could affect the amount of resistance in a wire for this investigation, i believe that altering the length of the wire throughout the experiment will be the best method. Material resistivity is an intrinsic property of the material and does not depend on the dimensions of the wire this should not be confused with resistance, which is a quantity that depends on the geometry of the wire as well as its material.
Resistivity is also important in power distribution systems as the effectiveness of the earth grounding system for an electrical power and distribution system greatly depends on the resistivity of the earth and soil material at the location of the system ground. Material and shape dependence of resistance the resistance of an object depends on its shape and the material of which it is composed the cylindrical resistor in is easy to analyze, and, by so doing, we can gain insight into the resistance of more complicated shapes. This circuit has a total wire resistance (wire 1 + wire 2) of 30 ω at standard temperature setting up a table of voltage, current, and resistance values we get: at 20 o celsius, we get 125 volts across the load and a total of 15 volts (075 + 075) dropped across the wire resistance. Almost all mechanical properties, such as strength, toughness, or creep resistance, depend on the grain size of the material, where the grain boundaries that can be considered as two-dimensional defects play a fundamental role in processing.
The resistance of an electrical conductor depends on several factors its physical shape is one factor the type of conductor material is another, as might be expected that is, two conductors with the same physical shape, but of different materials, have different resistances this important. The research program is focused on four different tma wire to highlight the characteristics of strength, elasticity and hardness key-words: tma orthodontic wires, mechanical caracteristics, orthodontics, biomechanics. Resistance: depends on size and shape - as well as on the material what is resistivity in effect, the resistivity represents the resistance across two opposite faces of a cubic metre of material (in the same way that density is the mass of a cubic metre. These results show that as the length of the wire increases, the resistance increases, as well furthermore, if you double the length of the wire, the resistance is roughly doubled for example, when the length of the wire is 20cm the resistance is 314 ohms when the length of the wire is 40cm the resistance is 618 ohms, which is roughly double.
The electrical resistance of a wire is greater for a longer wire and less for a wire of large cross sectional area the resistance depends on its length its area of cross-section, and the nature of its material the factor in the resistance, which takes into account the nature of the material, is. The resistance of a wire depends on the conductivity of the material used in the wire and also on the thickness and length of the wire describe ohms law and be able to apply it. Resistance of a wire data analysis coursework help for charter school year 10 how to complete the experiment.
Technically the rate of change of resistance is measured in terms of the temperature coefficient of the material greek symbol α represents temperature coefficient of the material the equation below is used to find the resistance of object at any temperature when the resistance at some specific temperature is known. Show transcribed image text the resistance of a wire depends upon the material's resistivity, and the length and cross-sectional area of the wire what will happen to the resistance of a wire if its length is multiplied by 4.
An investigation into factors affecting resistance of a wire essay - an investigation into factors affecting resistance of a wire plan: the possible variables i could use to find out factors affecting resistance are material wire is made of, length of wire, temperature and cross sectional area of wire. The resistance value of a wire depends on three parameters: resistivity, length and diameter the formula to calculate wire resistance is as follows: in which r is the resistance (ω. Observe changes to the equation and wire as you play with the resistivity, length, and area sliders sample learning goals predict how changing each variable will affect the resistance.