What is the resistance of aluminium wire?
What is the resistance of aluminium wire?
What is the resistance of aluminium wire?
Electrical resistance in plain copper or aluminum wires.
| Cross Sectional Area (mm2) | Resistance (ohm/km) | |
|---|---|---|
| Copper | Aluminum | |
| 0.75 | 23 | 35.3 |
| 1.0 | 17.2 | 26.5 |
| 1.5 | 11.5 | 17.7 |
What is specific resistance of a conductor?
Specific Resistance (”ρ”) is a property of any conductive material, a figure used to determine the end-to-end resistance of a conductor given length and area in this formula: R = ρl/A. Specific resistance for materials are given in units of Ω-cmil/ft or Ω-meters (metric).
How do you calculate the resistance of aluminum wire?
To calculate the resistance of a wire:
- Find out the resistivity of the material the wire is made of at the desired temperature.
- Determine the length and cross-sectional area of the wire.
- Divide the length of the wire by its cross-sectional area.
- Multiply the result from Step 3 by the resistivity of the material.
What is the conductivity of aluminium conductor?
Electrical Conductivity of Metals
| Material | Conductivity σ(S/m) at 20°C | Resistivity p(Ω•m) at 20°C |
|---|---|---|
| Annealed Copper | 5.80×10⁷ | 1.72×10-8 |
| Gold | 4.52×10⁷ | 2.44×10-8 |
| Aluminum | 3.5×10⁷ | 2.82×10-8 |
| Calcium | 2.82×10⁷ | 3.36×10-8 |
Which has more resistance copper or aluminium?
Detailed Solution. Aluminium wire has more resistivity than copper and resistance directly proportional to the length and inversely proportional to the area. So, an aluminium wire with more length and the lower area offers high resistance. From the options, an Aluminium wire of 8 m and 1 mm2 has the highest resistance.
Which one has more resistance copper or aluminium?
Copper has a significantly lower electrical volume resistivity: 0.017241 (Ω x mm2)/m for copper, compared to 0.0282 (Ω x mm2)/m for aluminium . This difference is highly relevant for power cables.
What is reciprocal specific resistance?
Conductivity The reciprocal of specific resistance is known as conductivity. It is represented by the symbol \sigma (sigma). Thus conductivity Its S.I. unit is ohmxmetre 1 or ohm −1 metre −1.
What do you mean by specific resistance of a material?
noun. 1. the electrical property of a material that determines the resistance of a piece of given dimensions. It is equal to RA/ l, where R is the resistance, A the cross-sectional area, and l the length, and is the reciprocal of conductivity. It is measured in ohms.
What is the resistance of Aluminium wire that is 10m long and has a diameter of 3mm?
What is the resistance of aluminum wire which is 10 m long and has a diameter of 3mm gives the resistivity of aluminium 2.65×10^-8 ohm.
Does aluminum have high resistance?
Aluminum was once used in home wiring but it corrodes easily, which can lead to high resistance and heat buildup at connection points.
Why is aluminum a good conductor?
Aluminum is a good conductor because it is a metal. In metals, the valence electrons are already detached due to the metallic bonds between atoms. We call these electrons that break the bond with their atom free electrons. They easily start moving whenever charge is applied to the metal.
Is aluminum a good thermal conductor?
Which Metals Conduct Heat The Best? As you can see, out of the more common metals, copper and aluminum have the highest thermal conductivity while steel and bronze have the lowest. Heat conductivity is a very important property when deciding which metal to use for a specific application.