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is it construct two wires of the same length one of copper and one of iron that would have the same resistance at the same temperature?
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What is the equation for the length and resistance of a wire?
R = (density)(Length)/(Area) Unit of resistance is Ohms.
How do you construct a circle that has radius with an equal length to the given line segment?
Adjust the compass to the given line segment then construct the circle.
Is it possible to construct a cube that is 500 cubic unit?
Yes and each edge will be 7.93700526 units in length
What is the change in length of a 2 m copper pipe if its temperature is raised from 21degrees C to 973degrees C?
The change in temperature is 973-21 = 952C The expansion over that range is 20.8 x 10 to the minus 6 per degree The change in length over 2 meters is 20.8E-06 x 952 x 2 = 0.0396 meters
Suppose you have two wires of equal length made from the same material how is it possible for the wires to have differents resistances?
You don't specify diameter. I am assuming it is the same. However, the larger the wire the lower the resistance. Temperature affects resistance. The hotter the wire, the higher the resistance. You also don't specify the layout of the wire. For example you could make a coil or choke with one wire.
Can copper and alluminium wire of same length and diameter have same resistance?
For a single temperature, yes. The copper wire will have a much smaller cross-section than the iron wire. For multiple temperatures, no. Copper and iron have different temperature coefficients for resistivity.
Suppose you have two wires of equal length made from the same material how is it possible for the wires to have different resistances?
The wires have different diameters. From the formula R = P*L/A. "A" is the the cross sectional area of the wire. Since the wires are of equal length and same material ("L" and "P") the only way they can have different resitances ("R") is if the diameters are different("A").
How do you calculate diameter of a copper wire conductor and how do we calculate resistance of a copper wire conductor of a particaular length?
You go to the NEC and look at the chart for developed length and the ambient temperature and the load factor and if it solid or stranded wire as stranded allows for more voltage
What affects the resistance of a conductor?
The length and the material that the conductor is made from. Different wire sizes have different ohm/foot. The longer the length of the conductor the higher the ohms/foot. Temperature also affects the resistance. Silver has the least resistance, followed by Copper, then Gold, then Aluminum. Here are some published resistances in micro ohm-cm: Silver - 1.6 Copper - 1.7 Gold - 2.2 Aluminum - 2.7
What doesn't affect the resistance of a uniform circular copper wire?
Is either; A. the length of the wire B. the diameter of the wire c. the location of the wire D. the temperature of the wire
How do you determine length of copper?
As the question is some what blind: However if the cross sectional area of the copper wire/rod is uniform, then we can find the length is we know the electrical residence between two ends. That is the concept of specific resistance is entering into picture to calculate the resistance then the length.
The resistance of a wire depends on the?
The length, cross-sectional area, and resistivity. As resistivity changes with temperature, temperature indirectly affects resistance.
What would reduce resistance in a copper wire?
Reduce the resistance:-- Use a shorter piece of wire.-- Use thicker wire.-- Cool the wire.Increase the resistance:-- Use a longer piece of wire.-- Use thinner wire.-- File a nick in the piece of wire you have.-- Stretch the wire.-- Heat the wire.
Resistance of a copper conductor will decrease with an increase of applied voltage?
Resistance is affected by the length, cross-sectional area, and resistivity of the conductor. The resistivity, in turn, is affected by temperature. So only by changing one of these four factors will the resistance of a conductor change. Changing voltage will have no affect upon the conductor's resistance.
What are four factor that determine resistance?
There are three, not four, factors that determine the resistance of a conductor. These are the length of a conductor, its cross-sectional area, and its resistivity.As resistivity is affected by temperature, you could say that temperature indirectly affects resistance but, strictly, temperature is affecting the resistivity not the resistance -which is why it is not considered a 'fourth' factor.So, resistance = resistivity x (length/area)
How does an RTD measure temperature?
An RTD, or resistance temperature detector is based in the principal that the resistance of a conductor changes as its temperature changes. The RTD consists of a long length of fine coiled wire made from some pure material such as nickel, platinum or copper. The coil is in the form of a probe and may be encased in a protective sheath. The wire material has a known response - in how its resistance changes with temerature - and this known change is used to determine temperature.
Will an increase of applied voltage decrease the resistance of a copper conductor?
No, the resistance is fixed by the cross section and length of the conductor and does not vary with voltage.
