Constantan wire coursework

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That's a little too close for comfort if you ask me! Dale Callaham Dale Callaham 1 1 silver badge 1 1 bronze badge. The excess material will drip off and leave you with a small ball at the tip of the wire pair. Joe Koberg Joe Koberg 3 3 bronze badges. Leon Heller Leon Heller Welding is good because it holds until the couple melts, not so with solder.

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Post as a guest Name. Email Required, but never shown. Featured on Meta. Related 7. Harm to minors, violence or threats, harassment or privacy invasion, impersonation or misrepresentation, fraud or phishing, show more. What is the resistivity of 24 swg constantan wire? Need this for my physics coursework, easy 10 points if you know the answer.

Report Abuse. Are you sure that you want to delete this answer? Yes No. Source s :. Add a comment. It considers that there are electrons on the outer shell of a metal are free to move at random.

Experiment to determine the resistivity of a metal wire

A piece of metal also has fixed ions, which are positive. These ions are said to be in a sea of electrons, which are negative. A wire also has these properties as it is made of metal. To the right is a diagram of a greatly magnified piece of wire. When a voltage is applied to the wire the negative electrons are attracted to the positive side of the wire For this investigation, I believe that altering the length of the wire throughout the experiment will be the best method.

I will use the same wire for all my measurements.

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It is important to have a fair test, so the cross-sectional area of the wire must be the same for all measurements because as the cross-sectional area increase the resistance decrease. It is also important to have the wire made of the same material because different materials have different resistance, nichrome is the good conductor of electricity.

The temperature also affect the resistance because when it increase the resistance in the wire increase Prediction I think that as the length of the wire increases so to will the resistance of it. I also believe that the rate at which the resistance of the wire increases will be directly proportional to the length. The graph to show this should therefore look something like this: The material and cross sectional area of the wire is constant throughout the experiment The number of free electrons depends on the material and more free electrons means a better conductor i.

For example, gold has more free electrons than iron, and as a result, is a better conductor Variables: All the possible factors that could affect the resistance of a circuit are the temperature, length, material and width of the wire. One of these I am going to chance for my input variable and the others I will keep the same for my control variable. Input variable: I am going to experiment with the length of the wire and see how that can change the resistance Resistance is caused when these electrons flowing towards the positive terminal have to 'jumps' atoms. So if we double the length of a wire, the number of atoms in the wire doubles, so the number of jumps double, so twice the amount of energy is required: There are twice as many jumps if the wire is twice as long For example gold has more free electrons than iron and as a result it is a better conductor.

The free electrons are given energy and as a result move and collide with other free electrons that are next to it. This happens across the length of a wire and the electricity is conducted Prediction I predict that the longer a piece of wire is, the higher its resistance, and the less current it will let through.

This is because the electrons lose energy trying to get through the rigid structure of the ions in the wire which slows them down through collisions. Therefore, if they are losing energy all the time they are travelling through the wire, the longer the wire, the more energy lost Resistance is how easily a potential difference is carried across a conductor. The higher the resistance, the bigger the potential difference has to be to go through the conductor. To do and understand this investigation I must see firstly what factors are involved when looking at resistance.

I have come up with six things which affect the resistance in a wire:- Thickness- If the wire is very thick i. Resistance is like a constriction in the flow and it's the pressure has to work against. So if the voltage is increased the move current will flow but if you increase the resistance less current will flow because of the pressure has to work against. The current in the metal wire is carried by electrons Varying certain values to indicate trends and patterns. These will be the length of wire and the strength of voltage moving through the wire.


  • Personal statement: Ivestigation to show if constantan is a suitable replacement to copper wire.
  • Resistance in a Constantan Wire.
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From these two variables I intend to examine the relationship between length of wire, voltage strength and resistance. Resistance: Resistance occurs when the electrons travelling along the wire collide with the atoms of the wire Prediction: If we start off by looking at the actual facts, what is resistance. The number of free electrons depends on the material and freer electrons means a better conductor, i.

Resistance of constantan wire coursework - ybodculo.tk

This provides the "pressure" to push the electrons forward. A battery for example would give a potential difference to a circuit and provide the force to begin the flow of electrons through it. Resistance is measured in Ohms W. It is anything in the circuit that opposes the flow of an electrical charge Prediction: - I predict that as the length of the wire increases the resistance will also increase.

It is a measure of how hard it is to move current through a component, it occurs when electrons travelling along the wire collides with the atoms of the wire. To choose a factor to measure I will make a list of the factors I could investigate and decide which one is best for me to investigate The copper wire of cm connected firmly to the piece of wood wood is used as it will not interfere and not conduct Prediction: I think that the longer the wire the higher the resistance.

I think this because as the electrons go through the wire the atoms get warm so the electrons slow down, this would be because the atoms are vibrating more and then its hard for the electrons to get past. Also when the wire is longer the further the electrons have to travel, so as they travel they lose some energy which makes them slower and the resistance is therefore higher Removing material in such a way is often advantageous when the work piece material would be difficult to machine with traditional machine tools due to high strength, hardness, toughness, etcetera Newton, Due to the process itself, EDM are able to produce any complex shape but at the loss of surface integrity and some other after effect like Kerf width, Heat affected zone and etc Better Essays words 4 pages Preview.

Powerful Essays words 4. The monumental task of flicking the power switch seemed to be within grasp. As I found myself holding my breath, along with everyone else present, the room was so silent that the dying of a gnat could have sounded like thunder on a stormy night Better Essays words 2 pages Preview.

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In this experiment I will be investigating the current- voltage relationship for a metal conductor. The variables that I need to keep constant in this experiment are: 1. Thickness of the wire. Length of the wire 3. Input of voltage coming from the power supply should be kept constant.

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Temperature of wire should be kept constant These results are sorted by most relevant first ranked search. You may also sort these by color rating or essay length. Investigating how the Resistance of a Constantan Wire is Affected by Its Length - Investigating how the Resistance of a Constantan Wire is Affected by Its Length Introduction: In this experiment we will be investigating how changing the length of a piece of Constantan wire will affect the resistance.

The Resistance of a Wire - The Resistance of a Wire Introduction In this investigation I will be trying to find out the resistance of a piece of constantan wire. Resistance of a Wire - Resistance of a Wire We are trying to find out what affects the resistance of a wire. The Resistance of a Wire - The Resistance of a Wire Aim: To investigate factors effecting the resistance of wires Planning: There are four main factors which will affect the resistance of a wire.

Structure of a Wire - Structure of a Wire A wire is made up of positive ions and negative electrons. Resistance of a Wire - Resistance of a Wire Plan In this investigation, we will be studying the resistance of a wire. Resistance of a Wire - Resistance of a Wire Introduction Resistance is the opposition a material offers to the flow of electricity. Resistance of a Wire - Resistance of a Wire Task To investigate how the resistance of a wire is affected by the length of the wire. Resistance of a Wire - Resistance of a Wire The title of our investigation is 'To electrical resistance in wires.

Checking the Resistance through Wire - Checking the Resistance through Wire We are using constantan wire to check the resistance thought wire; our variant is going to be the different length of wire. Resistance and Length of a Wire - Resistance and Length of a Wire I will test different lengths and areas of wire and observe and record the resistance. Investigating the Resistance of A Wire - Investigating the Resistance of A Wire We are doing a test to see if certain things can change the resistance of a wire. Investigating Resistance of a Wire - Investigating Resistance of a Wire Aim: To investigate how the resistance of a piece of resistance wire depends on length and to find the length of wire needed to make the required resistance.

Investigating the Resistance of a Wire - Investigating the Resistance of a Wire The aim of this investigation is to see how the length of a wire affects its resistance. Resistance of a Wire Investigation - Resistance of a Wire Investigation Aim: The aim of this experiment is to explore the effects of resistance that travels through a constantan wire when induced with an electric current.