Relationship between a conductors length and wire

The wire cross-section picture shown above is, of course, not drawn to scale.

Resistivity formula

This causes more collisions between the electrons and the atoms as the atoms are moving into the path of the electrons Look it Up! This in turn creates the light needed. Prediction: In this experiment, the input variable will be changing the length of the copper wire used in the experiment, and also the SWG of the wire, which means the width of the wire. We discovered that at too great a voltages and too short a length, the wire became very hot In this preliminary experiment we aimed to find out what thickness and type of wire would be suitable for the experiment, and what range of lengths of wire and range of voltages and currents would be suitable for measuring. Data Collection: I choose to collect my leaves from a tree in my back garden, as it was easy to access. This special unit is called the circular mil sometimes abbreviated cmil. Prediction: The longer the wire the more resistance there will be. A Amp circuit used for wall receptacles should be wired using gauge wire and a Amp circuit used for lighting and fan circuits should be wired using gauge wire. I picked the leaves from different places and different heights around the tree so that my sample of leaves would be random. By changing this variable, the current the circuit will vary. The gauge scale is based on whole numbers rather than fractional or decimal inches.

I must take in to account that temperature is very important as it can lose energy in the particles and I will have to measure the resistance of the circuit without the bare wire I will also investigate summary measures to represent my data.

Prediction: I believe that by increasing the wire's length it would increase the resistance As shown by the equation, knowing the length, cross-sectional area and the material that a wire is made of and thus, its resistivity allows one to determine the resistance of the wire. The larger the gauge number, the skinnier the wire; the smaller the gauge number, the fatter the wire.

Prediction: The longer the wire the more resistance there will be. On the other hand, the thinner gauge wire can support less current owing to its larger resistance; it is used in circuits which are protected by Amp fuses and circuit breakers.

The colors reveal information about the resistance value.

current vs length of wire graph

Variables I could change: I had the choice of several variables to change such as length, cross sectional area, material and temperature the experiment is conducted at. Aim: The aim of this investigation is to determine how the length of a wire can affect its resistance.

I choose a sample size of 35 leaves because it is large enough to reflect the trend amongst the width and length of the leaves on the tree, but still keeping it to a manageable size To work out the resistance of any given voltage, we must use Ohm's Law.

Relationship between current and length of wire

Type the name of the material and click the Submit button to find its resistivity. This in turn creates the light needed. Those materials with lower resistivities offer less resistance to the flow of charge; they are better conductors. Throughout this investigation I will include my prediction, method, diagram, results and a graph to show the relationship between the length of the wire and the resistance. Resistance occurs when the free electrons collide with the atoms. I choose a sample size of 35 leaves because it is large enough to reflect the trend amongst the width and length of the leaves on the tree, but still keeping it to a manageable size Planning: We conducted a preliminary experiment to help us conduct the real experiment. Prediction: In this experiment, the input variable will be changing the length of the copper wire used in the experiment, and also the SWG of the wire, which means the width of the wire.

See Answer A gauge wire is wider than gauge wire and thus has less resistance.

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