How does length of wire affect resistance

You must have JavaScript enabled in your browser to utilize the functionality of this website. Join over 1. Page 1. Save View my saved documents Submit similar document. Share this Facebook. How does the length of a wire affect its resistance. Extracts from this document I could have also, to make the investigation more accurate by measuring the temperature of the wire to find out whether different lengths of wires have different temperatures so as this may affect the resistance Overall, I feel the investigation was a success, and I believe I have achieved my aim of finding out how the length of wire affects the resistance.

Found what you're looking for? Not the one? Search for your essay title Resistance and Wires The width of the nickel-chrome wire will make a difference in the resistance of the wire because in a thin wire, there are a lot of electrons which have to travel in a proportionally small channel. Factors which affect the resistance of a wire These impurities slow down the movement of electrons passing through the wire.

Investigation: How length affects the resistance in a wire. How does length and width affect resistance The electrons carrying the charge are trying to move through the wire, but the wire is full of atoms that keep colliding in the way and making the electrons use more energy.

Does the length of a wire affect its resistance? To see how the length of a wire affects its resistance. To find the See more essays. Over , pieces of student written work Annotated by experienced teachers Ideas and feedback to improve your own work.

How is the resistance found? What is meant by an Ohmic Conductor? When is Ohm's Law not followed? What factors can cause a conductor to not follow Ohm's Law? Why does the resistance of a filament lamp increase with current? How does a thermistor work? As the temperature of an NTC thermistor increases, how does the resistance change? Based on the information stated in the above question, explain the risk involved in using gauge wire in a circuit that will be used to power an ampere power saw.

Thus, gauge wire can safely support a circuit that uses an appliance drawing up to 20 Amps of current. In fact, a Amp circuit is protected by a fuse or circuit breaker that will flip off when the current reaches 20 Amps. If a gauge wire was used on the same circuit, then the breaker would allow up to 20 Amps to flow through it. It could overheat and thus lead to the risk of fire. A Amp circuit should never be wired using gauge wire. Determine the resistance of a 1-mile length of gauge copper wire.

Two wires - A and B - with circular cross-sections have identical lengths and are made of the same material. Yet, wire A has four times the resistance of wire B.

How many times greater is the diameter of wire B than wire A? If wire A has four times the resistance, then it must have the smaller cross-sectional area since resistance and cross-sectional area are inversely proportional. In fact, A must have one-fourth the cross-sectional area of B.

Put another way, the diameter of wire B is two times greater than the diameter of wire A. Physics Tutorial. My Cart Subscription Selection. Student Extras. See Answer A gauge wire is wider than gauge wire and thus has less resistance.

This will continue to apply no matter how thick the wire is. Likewise, how does diameter of a wire affect resistance? As the diameter of the wire increases, the resistance decreases. In fact, if we double the cross-sectional area then the resistance halves. This means that resistance is inversely proportional to the area of the wire. Length : The resistance of the sample is directly proportional to its length. Diameter : The resistance of the sample is inversely proportional to the cross-sectional area, which is the same as saying 'inversely proportional to the square of the diameter '.

There is a higher current in the thicker wire although per unit area, of course, each wire carries the same current. A higher current for a given voltage means a lower resistance. The thicker wire in 4 has a lower resistance than the thinner wire in 3.

The resistance of a wire decreases with increasing thickness. The resistance of a long wire is greater than the resistance of a short wire because electrons collide with more ions as they pass through. The resistance of a thin wire is greater than the resistance of a thick wire because a thin wire has fewer electrons to carry the current. 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. See resistivity. The resistance of a conductor, or circuit element, generally increases with increasing temperature.