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Resistivity of copper at 20 degree celsius?
Resistivity allows us to compare different conductors' abilities to transmit electric current that is independent of the physical dimensions of the conductors.Resistivity is defined as 'the resistance of a unit length of a substance with a uniform cross-section'. In SI, the unit of measurement of resistivity is the ohm metre; in US customary units, it is expressed in ohm circular mil per foot.So, to finally answer your question, the resistivity of copper is 17.5x10-9 ohm metres at 20oC. To find the resistance of a copper conductor, you can then use the equation:resistance = resistivity x (area / length)Additional AnswerThe resistivity of copper depends on the temperature it which it is measured. At 25°C, it is about 17 nΩ.m, or 1.7 µΩ.cm.The resistance of a conductor is then p * L / A, where p is the above number.So for a wire with a length of 1 m (i.e. 100 cm), and a cross sectional area of 2 cm², the resistance is 17e-6 * 100 / 2 = 85 µΩ
What are the Factors that determine resistance value of electrical material?
The factors that determine the resistance value of an electrical material are its length, cross-sectional area, temperature, and resistivity. A longer material will have higher resistance, while a larger cross-sectional area will result in lower resistance. The resistance of a material also changes with temperature, with most materials increasing in resistance as temperature rises. Finally, resistivity is an intrinsic property of the material that determines how strongly it resists the flow of electricity.
What happens to the length of days and nights in winter?
Days get shorter and nights get longer until the winter solstice, at which point the days become longer and the nights become shorter.
When an electric stove element is hot enough it gives off a dull red glow When it cools to the point that it no longer glows what happens?
When an electric stove element cools to the point that it no longer glows red, it means that it is no longer emitting enough thermal radiation to produce visible light. The element will continue to radiate heat, but at lower temperatures the radiation shifts to wavelengths that are not visible to the human eye.
When warm moist air meets cold dry air over land?
As it rises to get over the mountain it cools. As it cools it can no longer hold as much moisture in solution so this precipitates out of the air on the seawards side of the mountain. When it is over the mountain it sinks again and is warmed so it is now warm dry air and very little precipitation happens (there is a rain shadow).
What happens to the resistance as the conductor is measured?
The longer the conductor the greater the end to end resistance.
What happens to the resistance of the conductor become longer but the diagram stays same?
If the length of the conductor increases while the cross-sectional area remains unchanged, the resistance of the conductor will increase. This is because resistance is directly proportional to length according to the formula R = ρ * (L/A), where ρ is the resistivity of the material, L is the length, and A is the cross-sectional area.
What are the factors that affect the resistance of a conductor?
The factors that affect the resistance of a conductor are the material it is made of, the length of the conductor, the cross-sectional area of the conductor, and the temperature of the conductor. Materials with high resistivity, longer lengths, smaller cross-sectional areas, and higher temperatures will have higher resistance.
What bone is thinner longer bone of the forearm?
The thinner , longer bone of the forearm.
What factors effect the resistance of a conductor?
Factors affecting the resistance of a conductor include the material from which it is made, its length, its cross-sectional area, and its temperature.
What happens to the resistance of the conductor if the conductors become longer but the diameter stays the same?
If the length of the conductor increases while the diameter remains constant, the resistance of the conductor will increase. Resistance is directly proportional to the length of the conductor, so a longer conductor will have higher resistance. The diameter, however, does not directly affect resistance as long as it remains constant.
What is the Longer bone of the forearm?
The thinner , longer bone of the forearm.
A muscle becomes longer and thinner when it?
relaxes
When muscles contract do they become shorter or longer?
muscles become longer, but thinner
How does a wedge change an input force?
A change can happen when a mechanical advantage increases as it becomes longer and thinner.
What four factors determine the resistance of a material and give examples of each?
The four factors that determine the resistance of a material are resistivity (intrinsic property of the material), length (longer length increases resistance), cross-sectional area (smaller area increases resistance), and temperature (increases in temperature usually increase resistance). Examples could be copper with low resistivity, a longer wire having higher resistance, a thinner wire having higher resistance, and a material like a semiconductor having resistance affected by temperature changes.
How does length affect the resistance?
Length directly affects resistance in a conductor. The longer the conductor, the higher the resistance due to increased collisions between electrons and atoms, leading to more energy loss. This is described by the formula R = ρ x (L/A), where R is resistance, ρ is resistivity, L is length, and A is cross-sectional area.
