2007-04-17 04:00:54 · 10 answers · asked by Miss J 3 in Science & Mathematics ➔ Other - Science
Resistance is a product of the length of a wire resitivity divided by the cross sectional area of the wire. Resitvity is a constant for different materials copper has a low resisitivity and rubber a high. If a wire is twice as long the resistance will be twice as great.
If all things other than length are equal resistance is proportional to wire length.
2007-04-17 05:44:56 · answer #1 · answered by Daniel B 1 · 0⤊ 0⤋
Modulus elasticity E = rigidity / stress, the place rigidity = F / A = stress / cross_section_of_wire stress = dL / L = elongation / initial_length Now positioned all of it returned into the 1st equation E = (F/A) / (dL / L) F = (EA/L) dL F = ok dL The final equation often used as a results of fact the Hooke's regulation, consistent with this regulation, the resistance of the wires is predicated on the stiffness (ok) of the wires, the place ok = EA/L The resistance will improve if a greater (greater thickness) The resistance will shrink if L longer (longer length) The resistance is likewise based on the type of wires, denoted with the aid of E (youthful's Modulus)
2016-12-16 08:15:46 · answer #2 · answered by anirudh 4 · 0⤊ 0⤋
Easy as PIE Ohms Law. Resistance equals Power times Currant; R=PxC. Resistance occurring in fluid dynamics can be applied as an example concerning resistance in electronics. Lets use a soda straw for the demonstration. The longer the straw the more vacuum necessitated in straws of unequal length and same diameter. A thinner straw will require more vacuum than a thicker straw of the same length. Back to electronics nonresistance relationship to circuitry can be seen more clearly in microwave circuitry: where circuitry length is often resistance and circuitry gaps are capacitance. Resistor's and capacitors are often substituted by wire length and circitry gaps.
2007-04-18 07:38:16 · answer #3 · answered by grysmn 4 · 0⤊ 0⤋
As long as the density of the wire is uniform along its length, the resistance is directly proportional with the length of the wire.
2007-04-17 04:05:48 · answer #4 · answered by Dr Who 2 · 1⤊ 0⤋
It's all about the tiny nano atoms running along the wire, they go so fast that they bunch up on one another as the wire gets longer,so they resist each other from travelling through the wire at the same speed. hence resistance
2007-04-17 10:47:13 · answer #5 · answered by jabus 1 · 0⤊ 0⤋
Resistance = (rho (resistivity of the material) * length)/cross sectional area . The longer it is the more resistance
2007-04-17 04:08:25 · answer #6 · answered by Del Piero 10 7 · 0⤊ 0⤋
The longer the wire is , the harder it is to get through.
The narrower the wire is the harder to get through.
Material also effects resistance.
2007-04-17 05:12:27 · answer #7 · answered by science teacher 7 · 0⤊ 0⤋
Most wire has x ohms per 100 ft.
2007-04-17 04:12:49 · answer #8 · answered by JOHNNIE B 7 · 0⤊ 0⤋
Yes. Gauge matters as well. It is negligable for short distances, but can be a huge factor for things like power transmission.
2007-04-17 04:04:33 · answer #9 · answered by JEREMY S 2 · 0⤊ 0⤋
it will increase as the length increases
2007-04-17 04:04:23 · answer #10 · answered by jim G 2 · 0⤊ 0⤋