# Physics/electricity

Eighteen-gauge wire has a diameter of 1.024 mm. Calculate the resistance of 19 m of 18 gauge lead wire at 20°C.

1. 1
1. The answer is 5.075 ohms

posted by Pat
2. resistivity at 20℃ is
ρ=22•10⁻⁸ Ohm•m

R= ρL/A= 4ρL/πD²=
=2•22•10⁻⁸•19/ π(1.024•10⁻³)²=
=5.076 Ohms

posted by Elena

## Similar Questions

1. ### Physics

What length of #22 B&S gauge copper wire is needed to make a resistance of 500 ohms? This is what I came up with but don't think it is correct. looked up diameter for #22 gauge wire = .643 mm and converted to m 6.46 * 10^-4. Used
2. ### Algebra II

The resistance of a wire is inversely proportional to the square of its diameter. If an AWG (American wire gauge) size 12 conductor (0.0808-in. diameter) has a resistance of 14.8, what will be the resistance of an AWG size 10
3. ### Math

The electrical resistance of a wire waves directly as its length & inversely as the square of its diameter if a wire 30m long and 0.75mm in diameter has a resistance of 25ohms , find the length of a wire of the same material whose
4. ### Chemistry

Is this EXTENSIVE OR INTENSIVE? 1. number of calories in 10 grams of sugar. 2. Percentage of alcohol in a beer. 3. Electrical resistance of 1km length of 22 gauge copper wire 4. Electrical resistance of 22 gauge copper wire.
5. ### physics

The resistivity of silver is 1.59 × 10-8 Ω·m. What is the resistance of a section of 12 gauge wire (diameter 0.2057 cm) that is 8.60 m long?
6. ### physics

The resistivity of silver is 1.59 × 10-8 Ω·m. What is the resistance of a section of 12 gauge wire (diameter 0.2057 cm) that is 8.60 m long?
7. ### college algebra

The electrical resistance of a wire of a given material varies as its length and inversely as the square of the diameter. if a wire 300 feet long and 0.05 inches in diameter has a resistance of 30 ohms, (a) find the resistance of
8. ### Chemistry 101

A 16 Gauge wire has a diameter of 0.0508 inch. Calculate the length in meters of a 5.00 pound spool of this wire. The density of copper is 8.92g cm^-3
9. ### engineering physics 2

A 19 m long piece of wire of density 8.34 g/m3 has a diameter of 12.593 mm. The resistiv- ity of the wire is 1.7e-8(ohm)(m) at 20 degrees celsius. The temperature coefficient for the wire is 0.0038(degrees celsius)^-1. Calculate
10. ### Chemisty

Wire is often sold in pounds spools according to the wire guage number. That number refers to the diameter of the wire. How many meters are in 3-Ib spool of 12 gauge aluminum wire? A 12-guage wire has a diameter of 0.0808 in.

More Similar Questions