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Resistivity is a property of a substance, and doesn't depend on the dimensions
of a sample. If the length of a conductor is doubled, then its resistance doubles
but its resistivity doesn't change.
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∙ 12y ago
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Does resistivity depend on length and area of the cross section of the material?
No. Resistivity is a material constant, defined for a standard size of material. For another size of material, it can be calculated. Resistivity is the same for any piece of material; resistance can change.
If a wire of resistivity is stretched to thrice its initial length what will be its new resistivity?
the resistivity will increase by nine times
If the diameter of wire is double what is resestivity?
Resistivity won't change. Resistivity is a material property that doesn't depend on the shape.
How do you reduce resistivity of a wire length and diameter should be equal or length should be halve or both should be halved or length should b doubled and diameter should be halved or diameter doub?
'Resistivity' is usually considered to be a property of a substance, not a structure.In the normal unit of resistivity, the length and cross-section area are divided out,so they don't affect the 'resistivity.In the case of your piece of wire, the only characteristic that it seems reasonableto discuss is just plain good old 'resistance'.I think the point of this question is to investigate the relative effects ... of a changein length compared to the same change in diameter ... on the initial resistance of apiece of wire.Length:The resistance of the sample is directly proportional to its length.Diameter:The resistance of the sample is inversely proportional to the cross-sectional area,which is the same as saying 'inversely proportional to the square of the diameter'.So, let's look at the choices listed in the question:Change length to 1/2:Resistance changes to 1/2 .Change length and diameter both to1/2 :Resistance changes by factor of 1/2 x 4 = 2Length doubles, diameter 1/2:Resistance changes by factor of 2 x 4 = 8 timesLength doubled, diameter doubled:Resistance changes by factor of 2 x 1/4 = 1/2The first and last choices both reduce the resistance.The others both increase the resistance.
What is dimension for resistivity?
Resistivity is equal to the product or resistance n area over divided over length ....is dimension is [m^1 l^3 t^-4 a^-3]
How does resistivity vary if length and area are doubled?
if length is doubled then resistivity increases&when area is doubled resistivity decreases.
What is the Change in resistivity of wire when its resistivity is doubled?
Resistivity of a wire of a certain material is independent of the wire's length. The only thing that would change is resistance. Since R=ρ/A, in the case of length doubling, resistance will also double.Resistance (R, Ω)Resistivity (ρ, Ω m)Length (, m)Cross surface area (A, m²)
How does a volume of a rectangular prism change if the width and length are doubled?
If length and width are doubled than the volume should multiply by 8.
What happens to resistance when length of conductor is doubled without affecting thickness of conductor?
Nothing. Resistivity is a physical characteristic of a material. It's not affected by its shape, etc.
How does the surface area of a rectangular prism change when the length and width and height are doubled?
if length and width are doubled then the volume should mulitiply by 8
Does the resistance of a conductor incfrease by any measure when the conductor is in doubled in length?
The resistance is directly proportional to the length of conductor and inversely proportional to area of the cross section.If the length is doubled then the resistance will double.Resistance=rho*l/arho=resistivity of the material (Ohms/m) and depends on the material used for the wirel=length of the wirea= area of the cross section of the wire.
What happens to the volume of a Prism if the length is doubled?
If only the length is doubled, the volume is also doubled.If only the length is doubled, the volume is also doubled.If only the length is doubled, the volume is also doubled.If only the length is doubled, the volume is also doubled.
Does resistivity depend on length and area of the cross section of the material?
No. Resistivity is a material constant, defined for a standard size of material. For another size of material, it can be calculated. Resistivity is the same for any piece of material; resistance can change.
Why does the electrical resistivity of a conductor does not depend on its dimensions?
resistivity and resistance are two diff. things...........resistance depends on length and thickness resisitivity too depends on the area and length resistivity=resistance*area/length
If the length of a rectangle is doubled does the area double?
Assuming no change in the width, yes.
How do you calculate a cross-sectional area When all you know is resistance resistivity and length?
I think the equation you are looking for is Resistance (ohms) = Resistivity * Length / Area or R=p*L/A. This is the resistance of a circular wire with cross-section of A, length of L, and material with resistivity p. So to get area: Area = Resistivity * Length / Resistance.
Three ways which resistance of a wire can be increased?
You can increase the resistance in the wire, by doing any of the following:Increase the length of the wire.Reduce the wire's cross-section.Change to a material that has a greater resistivity (specific resistance).You can increase the resistance in the wire, by doing any of the following:Increase the length of the wire.Reduce the wire's cross-section.Change to a material that has a greater resistivity (specific resistance).You can increase the resistance in the wire, by doing any of the following:Increase the length of the wire.Reduce the wire's cross-section.Change to a material that has a greater resistivity (specific resistance).You can increase the resistance in the wire, by doing any of the following:Increase the length of the wire.Reduce the wire's cross-section.Change to a material that has a greater resistivity (specific resistance).
