0
How do you find length and crosssectional area of a wire given just resistancevolume and resistivity?
Wiki User
∙ 10y ago
Resistance varies directly as length
Resistance varies inversely as cross-sectional area
Hence R varies as L
and R varies as 1/A
Thus R = r(L/A) where r is the coefficient of resistance of the wire. If the wire is of uniform cross section, then A = V/L where V is the volume of the wire. Hence now we have R = r(L/(V/L)) or R = r(L-squared/V) or L-squared = (RxV)/r and so the answer would be L = square-root of (RxV)/r
Wiki User
∙ 10y ago
Add your answer:
Earn +20 pts
How do you find the radius given the chord length?
If you are given a chord length of a circle, unless you are given more information about the chord, you can not determine what the radius of the circle will be. This is because the chord length in a circle can vary from a length of (essentially) 0, up to a length of double the radius (the diameter). The best you can say about the radius if given the chord length, is that the length of the radius is at least as long has half half the chord length.
How do you find the length and width and the area is given?
If the area is already given, there should also be either width or length given. Do the area, divided by the length or the width. For example, the area divided by the width equal the length. Hope it helps.
How do you find radius of curvature if focal length is given?
radius of curvature = 2Focal length
What is the area of the rectangle when the length and breadth are given?
All you need to do is length x breadth = area
What is the length of a rectangle that has a width of 2.5cm and an area of 20.5cm2?
Given , area =A= 20.5cm2 = length*width, so (length)(2.5)=20.5 or length=20.5/2.5=8.2cm approx.....
What is the difference between resistance and the resistivity?
Resistance is the value of a given wire in ohm but resistivity is value of the material with which that wire is made in ohm meter. R = rho * L / A Here rho is resistivity and R is resistance. L is the length of the wire and A is area of cross section
What does resistance in wire depend on?
Resistance is directly proportional to the resistivity and length of the conductor, and inversely-proportional to its cross-sectional area. As resistivity is affected by temperature, we can say that temperature indirectly affects resistance.
What is resistivity and what factor does it depend?
Electrical resistivity (also known as resistivity, specific electrical resistance, or volume resistivity) quantifies how strongly a given material opposes the flow of electric current. A low resistivity indicates a material that readily allows the movement of electric charge. Resistivity is commonly represented by the Greek letter ρ (rho). The SI unit of electrical resistivity is theohm⋅metre (Ω⋅m)It defined as resistance offerde by a unit length and cross section area conductor.It depends on material used.it depends on relexation time and temperature.
Difference between resistance and resistivity?
Nothing. Resistivity is defined as specific resistance. However, Resistivity is different from resistance.Answer:Resistance is the opposition offered by the material which is of any shape and size whereas resistivity is the resistance offered by the material with unit area of cross section and unit length.Therefore, resistance varies depending upon shape and size of the material while resistivity is constant for a particular material.
What is the relationship betwen resistance and resistivity?
They are just different forms of the same word as it applies in electricity. The higher the resistance or resistivity of a load, the less the current for a given voltage. There are likely grammatic rules that apply for usage in a sentence, but you'll have to check on that with a grammarian.
What is the relationship between resistivity and circumference?
The relationship between resistivity and circumference is inverse.The resistance of a substance decreases as the surface area of that substance increases. The greater circumference presents a greater conduction surface.AnswerThe original answer describes resistance, NOT resistivity. Additionally, it is incorrect because resistance is inversely-proportional to cross-sectional area NOT circumference!There is NO relationship between resistivity and the circumference of a material. Resisitivity is a constant at any given temperature and is completely unaffected by the dimensions of a material.
Does every different conducting substance have a unique resistivity?
Please note that resistivity also depends on temperature.In the most general case, the answer is definitely NO; all superconductors have the same resistivity, namely zero. Other than superconductors, take a look at a table with some typical resistivity values. It would seem quite obvious that for a given temperature: * Two different substances will, in general, have different resistivities. * In practice, in some cases the difference in resistivity might be too small to reliably measure. * It should be possible to find two substances that have the same resistivity at a very specific temperature - since the temperature-dependence will vary from one material to another. * Likewise, it should be possible to design a mix of two substances, which exactly matches that of another, given, substance.
How do you find the radius given the chord length?
If you are given a chord length of a circle, unless you are given more information about the chord, you can not determine what the radius of the circle will be. This is because the chord length in a circle can vary from a length of (essentially) 0, up to a length of double the radius (the diameter). The best you can say about the radius if given the chord length, is that the length of the radius is at least as long has half half the chord length.
What is a path length in physics?
the path length of an object in motion in a given time is the length of actual path traversed by the object in the given time.
How do you find the length and width and the area is given?
If the area is already given, there should also be either width or length given. Do the area, divided by the length or the width. For example, the area divided by the width equal the length. Hope it helps.
How do you find the height of a cuboid when the length and width is only given?
By dividing length times width into its given volume
How do you find the length of a segment when given the endpoint and midpoint?
double the length
