Table of Contents
- 1 What is the relationship between resistance and area of A wire?
- 2 How is resistance related to area?
- 3 What is relation between R and L?
- 4 What is resistivity equation?
- 5 What is dimensional formula of resistance?
- 6 How much resistance is in a wire?
- 7 How do you calculate the resistance of a wire?
- 8 What is the equation for the resistance of a wire?
- 9 How is the resistance of a wire determined?
What is the relationship between resistance and area of A wire?
The relationship between resistance and the area of the cross section of a wire is inversely proportional . When resistance is increased in a circuit , for example by adding more electrical components , the current decreases as a result.
Resistance is proportional to resistivity and length, and inversely proportional to cross sectional area.
What is the formula for resistance of A wire?
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.
What is relation between R and L?
R=ρLA.
What is resistivity equation?
Resistivity, commonly symbolized by the Greek letter rho, ρ, is quantitatively equal to the resistance R of a specimen such as a wire, multiplied by its cross-sectional area A, and divided by its length l; ρ = RA/l. The unit of resistance is the ohm.
What is relationship between resistance and diameter?
As we know that resistance of a wire is inversely proportional to the square of its diameter. Thus when the diameter of a wire is doubled (made 2 times), its resistance becomes one-fourth (1/4), and if the diameter of a wire is halved (made 1/2), then its resistance becomes four times (4 times).
What is dimensional formula of resistance?
Derivation of Resistance Dimension Therefore, the resistance is dimensionally written as M L2 T-3 I-2.
How much resistance is in a wire?
Common Wire Gauges
| AWG wire size (solid) | Diameter (inches) | Resistance per 1000 ft (ohms) |
|---|---|---|
| 16 | 0.0508 | 4.016 |
| 14 | 0.0640 | 2.525 |
| 12 | 0.0808 | 1.588 |
| 10 | 0.1019 | 0.999 |
What is the resistance of a wire?
The ohm is the common unit of electrical resistance, equivalent to one volt per ampere and represented by the capital Greek letter omega, Ω. The resistance of a wire is directly proportional to its length and inversely proportional to its cross-sectional area. Resistance also depends on the material of the conductor.
How do you calculate the resistance of a wire?
The resistance of a wire is given by the equation: R = ρ x l/A. Where R is resistance, ρ (pronounced ‘rho’) is the resistivity of the wire, l is length and A is its cross-sectional area.
What is the equation for the resistance of a wire?
The following equation is used to calculate the resistance of a wire. R = ρ * L / A Where R is the resistance in Ohms ρ is the resistivity of the material the wire is made of.
What kind of wire has the most resistance?
Types. Nichrome, a non-magnetic 80/20 alloy of nickel and chromium, is the most common resistance wire for heating purposes because it has a high resistivity and resistance to oxidation at high temperatures. When used as a heating element, resistance wire is usually wound into coils.
How is the resistance of a wire determined?
The resistance of a wire is determined by the material, length and cross-section of the wire. You can calculate the resistance of a wire with the calculator below or calculate it yourself with the formulas. R is the symbol for resistance and is measured in ohm (Ω).