How do you calculate copper resistance?
How do you calculate copper resistance?
Engineers often ask how to calculate the resistance of a cable, there is a very simple formula that works well within an ohm or so with copper cable. 19 ÷ by 2.5mm² will give you 7.6 ohms per km. ÷ by 1000 for resistance per meter. 19 ÷ by 4mm² will give you 4.75 ohms per km.
What is the resistance of copper?
Resistivity and Temperature Coefficient at 20 C
| Material | Resistivity ρ (ohm m) | |
|---|---|---|
| Copper | 1.68 | x10-8 |
| Copper, annealed | 1.72 | x10-8 |
| Aluminum | 2.65 | x10-8 |
| Tungsten | 5.6 | x10-8 |
What is the resistance of a 5.4 m length of copper wire?
5.1×10−2Ω
What is the resistance for 1000 of 4 0 AWG copper?
Gauge, weight, circular mils and electrical resistance in copper wire.
| AWG Gauge* | Area (Circular Mils) | Electrical Resistance (Ohms/1000 ft) |
|---|---|---|
| at 149oF (65oC) | ||
| 0000 (4/0) | 212000 | 0.057 |
| 000 (3/0) | 168000 | 0.073 |
| 00 (2/0) | 133000 | 0.092 |
What is the resistance of 1mm copper wire?
Electrical resistance in plain copper or aluminum wires.
| Cross Sectional Area (mm2) | Resistance (ohm/km) | |
|---|---|---|
| Copper | Aluminum | |
| 1.0 | 17.2 | 26.5 |
| 1.5 | 11.5 | 17.7 |
| 2.5 | 6.9 | 10.6 |
How do you calculate resistivity resistance?
The resistance of a cylindrical segment of a conductor is equal to the resistivity of the material times the length divided by the area: R≡VI=ρLA. The unit of resistance is the ohm, Ω.
What is the resistance of a copper wire 200 ft long?
5.17 ohm
The calculated value of the resistance of the given copper wire is 5.17 ohm.
What is the resistance of a 3.5 m copper wire 1.5 mm in diameter?
3.3×10−2Ω
What is the resistance of a 4.9 m length of copper wire 1.9 mm in diameter?
What is the resistance of a 4.9-m length of copper wire 1.9 mm in diameter? The resistivity of copper is 1.68×10−8Ω⋅m.
What is the resistance of 4 0 copper wire?
Gauge, weight, circular mils and electrical resistance in copper wire.
| AWG Gauge* | Area (Circular Mils) | Electrical Resistance (Ohms/1000 ft) |
|---|---|---|
| at 77oF (25oC) | ||
| 0000 (4/0) | 212000 | 0.0500 |
| 000 (3/0) | 168000 | 0.0630 |
| 00 (2/0) | 133000 | 0.0795 |
How to calculate the resistance of a round copper wire?
The Wire Resistance Calculator is designed to calculate the resistance of round copper wire. The formula to calculate resistance is: Where. R = Resistance in ohms. ρ = The resistivity of the conductor (copper = 1.678 × 10 -8 ohms·metre at 20°C) l = Conductor length in metres. r = Conductor radius in metres.
What is the formula to convert amps to resistance?
Formula to convert amps to resistance (Ohm Law): 1 R = Resistance in Ohm. 2 I = Current in Amperes. 3 V = Voltage. The simplest way to convert from Amps to resistance, is by the formula of Ohm’s law, dividing the voltage between the current.
What is the unit for the resistivity of copper?
While you can look up the resistivity of copper on wikipedia or Kaye & Laby, you’ll find that the answer is given in units of 10^-8/m. I don’t know about you, but I always miscount powers of 10 when using that sort of unit.
What is the resistivity of a 4mm wire?
If the wire is 4mm2, it will have 1/4 the resistance, because it’s like four 1m lengths in parallel. Copper, like all pure metals, has a fairly strong temperature coefficient of resistance, which is why I’ve only given the resistivity to 2 significant figures.
