Physics investigation of resistance aim: to investigate how the electrical resistance of a wire changes in relationship to ités length prediction: i think that as the length of the wire increases so to will the resistance of it. The connection between current, voltage and resistance was discovered in 1827 by georg ohm, a german physics and how does length affect resistance when the length of the wire increases, resistance increases. A simple investigation of the factors affecting the resistance of a wire a simple investigation of the factors affecting the resistance of a wire resources topical and themed pre-k and kindergarten investigating the resistance of wires activity. For example, when the length of the wire is 20cm the resistance is 314 ohms when the length of the wire is 40cm the resistance is 618 ohms, which is roughly double in my main investigation i will see if this observation applies to my results. This experiment was a fair test because other factors that could affect the resistance in a wire were kept constant such as length, material of wire and temperature of wire the equipment used for experiment was also kept constant, as was the environment for the experiment.
In this investigation, i will set up a simple circuit to be able to read the voltage and current when the length of wire changes, so i then can work out the resistance i will be using constantan wire starting of with 1m length and then decreasing it by 010m intervals down to 020m long. The length of lead wire and good thermal contact between the thermocouple junction and ablation material, are considered to be the same for all thermocouples in the present investigation. 1 introduction the problem i am investigating is the effect of temperature on conductivity and resistanceusing a suitable conductor such as a copper wire, the following experiment will study whether the temperature of a wire will affect the flow of electrical current through a conductor. Length of connecting wire the same connecting wires were used throughout the experiment as the length of the wire is also a factor that affects resistance4mm 0 apparatus – 1 if the length of the resistance wire is different for each wire41 resistance/ohms 162 14mm 027 03 0.
To investigate how the length of a nichrome wire can affect the resistance of a wire i will also observe the thickness has any effect on resistance and length we will write a custom essay sample on factors affecting the resistance of a wire specifically for you for only $1638 $139/page order now search. Gcse physics coursework - resistance of a wire coursework resistance of a wire task to investigate how the resistance of a wire is affected by the length of the wire. Ohms law states that if the cross section of the wire is uniform then the resistance is proportional to the length and inversely proportional to the area of the cross section the diameter of the wire will have an affect on the resistance of a wire. For each wire plot a graph of resistance (y-axis) against length 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.
The experiments will be investigating the relationship between the thickness of the wire and the length of the wire i will connect up a circuit like shown above, the power supply coming from a power pack. Introduction- in our investigation we are trying to find out that what are the factors which effect the resistance of a resistance wire through textbooks and information from the internet i have identified these factors. There are four factors that affect the resistance of a wire: resistance is proportional to length if you take a wire of different lengths and give each a particular potential difference across its ends the longer the wire the less volts each centimetre of it will get.
The length of the wire doesnt practically have an effect on the current, but it has a considerable effect on the voltage profile across the wire provided that the wire is feeding a considerable amount of load in the intermediate path or at the extremity. Some of the concepts which might be introduced for the first time in natural sciences, have already been covered in the technology curriculum how does the diameter or cross-sectional area of the wire affect the resistance of the wire investigation: how does the length of the wire affect the resistance of the wire. Extended experimental investigation: wires carry electrical current in circuits ie the length of the wire, the cross- the influential effect it has on resistance (virtual institute of applied science) the relationship between length (l) and resistance (r) is shown in figure 2. In my physics coursework i am going to investigate the effect of the length of a wire on its resistance resistance is the measure of how easy it is for current to flow through a wire current is the rate of flow of charge through a conductor, and it is measured in amps using an ammeter. Investigate how length affects the resistance of a length of wire stretch out the wire onto the bench and measure with a metre rule the power supply was put on 2v and the gradually increased the 4v, to find a suitable current for my main method.
To investigate how the length of a wire affects its resistance 0 type of wire- the arrangement of the nuclei in the wire can make a collision more or less likely depending on density on the wire. Can broaden our definition of a ‘resistor’ to include anything you put into the circuit—a wire a motor even a hot dog let’s ask this question: “is there anything that does affect the resistance of a resistor” as it turns out, the temperature of the resistive device can a 45-cm-length sample of wire, resistor. Resistance and thickness of wire (cross-sectional area) compare two circuits with batteries of the same voltage, with the same length of wire, made of the same material, but one wire is thicker than the other. The wire material is also an important factor to consider, as it can affect the wire length that can be used on a project highly conductive materials like silver and copper offer the least amount of resistance to the flow of electrons compared to a highly resistant material like rubber.
The objective for my coursework (as already stated above) is to investigate how changing the length of wire can affect the resistance there are factors which can affect how accurate our expriment is come on four levels. Resistance vs length obtain various lengths of the same gauge copper wire (we used 02, 04, 06, 08 and 10 meter lengths of 22-gauge wire) set up a series circuit using a 3-v dc power supply, a current probe (ammeter), a 10 ω resistor, and one length of the copper wire. Investigating how the length of a wire affects its resistance record the voltage and investigation resistance is to do with how easy it is for the electric current to flow 2,112 words linear (copper wire 1 none.
How does the length of a wire affect its resistance introduction: this first report in physics will show the investigation of how the length of a wire affects its resistance. Use appropriate apparatus and methods to measure current and potential difference to work out the resistance aim of the experiment to investigate how changing the length of the wire affects its.