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How does resistivity vary if length and area are doubled?

Anonymous

∙ 12y ago

Updated: 12/18/2022

if length is doubled then resistivity increases&when area is doubled resistivity decreases.

Wiki User

∙ 12y ago

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More answers

resistance increases with the increase in length of the wire and decreases with the increase in area of cross section

Anonymous

∙ 4y ago

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Related Questions

How does resistivity vary if area is halved?

If the area is halved while keeping the length and resistivity constant, the resistance will double. This is because there is less space for the electrons to flow through, increasing the collisions encountered, hence increasing the resistance.

Can you represent electrical conductivity by finding its electrical resistance?

Conductivity is the reciprocal of resistivity, and is expressed in siemens per metre (S/m). Resistivity and, therefore, conductivity vary with temperature so are usually quoted at a specified temperature.Resistance is expressed in ohms. If you accurately measure the resistance, length, and cross-sectional area of a conductor, then you could determine its resistivity and, from that, its conductivity.

How does the resistance of a wire vary with its length?

The resistance of a wire is directly proportional to its length. This means that as the length of the wire increases, the resistance also increases. This relationship is described by the formula R = ρ * (L/A), where R is resistance, ρ is the resistivity of the material, L is the length of the wire, and A is its cross-sectional area.

What is the area of a rectangle with a perimeter of 26?

Sorry- no one answer- the area will vary depending on the length of the sides.

Area of different shapes of equilateral triangle?

There is only one basic shape for an equilateral triangle. The area can only vary as the length of the sides vary.

In ohms what is the electrical resistance of water?

To figure the resistance of a substance in ohms, more information would be needed. Resistance is calculated by (resistivity)*(length)/(cross sectional area). First consider a wire conductor. Electrical resistivity is a property of the substance (it usually will vary with temperature). The thicker a wire is (larger cross sectional area) will lower the resistance. The longer the wire will increase the resistance. Now consider water. There is no 'wire' so the cross sectional area of whatever conductor is in contact with the wire will be a factor. A second conductor will need to be in contact with the water to complete the current path. The distance between the conductors is the length. Resistivity has a unit of ohms*meters; when divided by area and multiplied by length, the resulting unit is ohms. The reciprocal of resistivity is conductivity, which has units of Siemens/meter (Siemens is equivalent to 1/Ohms) I have posted a link to the Wikipedia article, listing conductivity values for several conducting elements (and water as well). Pure water with no impurities actually has a very high resistivity (low conductivity, which means not much current will flow). Pure water is not very common, and the type and amount of impurities affects the conductivity of the water sample. Conductivity of typical drinking water is in the range: 0.0005 to 0.05 Siemens per meter, so the reciprocal (resistivity) is 2000 Ohm*meters to 20 Ohm*meters. Note from the same chart that deionized water has a conductivity of 5.5 × 10-6 Siemens/meter --> resistivity = 181,818 ohm*meters.

How does the resistance of a wire vary with its diameter?

The resistance of a wire is directly proportional to its length and inversely proportional to its cross-sectional area. Therefore, as the diameter of a wire increases, its cross-sectional area also increases, leading to a decrease in resistance. This relationship follows the formula for resistance: R = ρL/A, where R is resistance, ρ is resistivity, L is length, and A is cross-sectional area.

What is the resistivity of sand sandstone and shale?

The resistivity of sand can vary widely, but generally ranges from 1,000 to 10,000 ohm-meters. Sandstone typically has a resistivity of around 1 to 100 ohm-meters. Shale generally has a resistivity of 0.1 to 10 ohm-meters.

What is the resistivity of plastics?

The resistivity of plastics can vary depending on the type of plastic material. Generally, plastics have higher resistivity compared to metals, with values typically ranging from 10^12 to 10^20 ohm-meter. Conductive additives or treatments can be incorporated into plastics to lower their resistivity for specific applications.

Why do the values of resistivity differ so much between materials?

The values of resistivity differ between materials due to variations in their atomic structure, electron configuration, and bonding characteristics. Materials with more free electrons, such as metals, have lower resistivity, while insulating materials with tightly bound electrons have higher resistivity. The presence of impurities and defects in a material can also influence its resistivity.

How long is a short school bus?

The length of a short school bus tends to vary depending on the area. However, the average length is about 15 ft.

What is the length of a skirt?

They can vary from floor length to thigh length.

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