Resistance of a wire experiment. Resistance Experiment (examples, solutions, videos, notes) 2022-12-11

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Experiment 1

resistance of a wire experiment

The 34swg wire gave the widest range of resistance therefore I will use this for my experiment as this will give me a clear apparent result. You can take measurements of current and potential difference, plot a graph of their IV characteristics, and find their resistance values. There are three types of tests carried out within this project, preliminary testing, functional testing and characterisation testing; each of type of tests examines the system in a greater depth than the preceding test type with characterisation testing being the most in-depth. An ammeter will be connected in a series arrangement with the Nichrome wire to ascertain how the length of a wire affects its resistance. Copper naturally has a low resistance due to it being a superconductor, meaning that it only has a resistance of minute amounts. I repeated the test twice to confirm that the results were reliable and the exclusion of any anomalous results the combination of these results ensures they are dependable. .

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Resistance of a Wire Experiment

resistance of a wire experiment

The line of best fit demonstrates a positive correlation. The results to these tests are compared against the project aim and consequently are used to formulate a conclusion top the project. These electrons travel around the circuit at an even pace. Evaluation After looking at all of my results, I believe that the method I used and the ways of reducing the uncertainty in my experiment were effective. My graph is evidence to prove this. I can predict that the thinner the wire the higher the resistance. Nt1310 Unit 1 Lab Report 333 Words 2 Pages Therefore, the purpose of the lab, which was established as, to see the role that static electricity has on objects, when determining their charge and how they interact, is fulfilled in a wall mannered fashion.

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Resistance (of a wire)

resistance of a wire experiment

The power pack will have a cable connected to the set of wires. In a thin wire these electrons have to constrict tightly together in order to pass through, however in a thick wire these electrons do not have to constrict together as much to be able to pass through. Preliminary Method: · First of all one must consider the safety issues in this experiment, integral to any investigation. Electricity is also used in heaters, from industrial furnaces for large-scale materials processing through to ovens, underfloor heating and kettles, and in all sorts of electronic devices, such as computers, screens and sensors. My predictions were correct as the resistance of my wire did increase and the diameter and therefore cross sectional area of my wire were equal all the way along.

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Resistance in a wire

resistance of a wire experiment

But on the other hand, there were many factors that could be improved if I was to ever do the experiment again. Whist measuring the thickness of the wire I will take 3 readings from different places on the wire and then take an average. Preliminary work Firstly I assembled the apparatus as shown in the diagram below. The voltage started from as low as 15 and went up as high as 450. Understanding how the resistors in the circuit allowthis is important for designing many electronic circuits. Apparatus Required Ammeter Range: +20 to -20, to the nearest 0.

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To investigate the factors of affecting the resistance of...

resistance of a wire experiment

I am therefore confident that the results are reliable as there is no obvious differ. This value was used throughout the experiment to work out the different resistivity values using the resistivity equation as stated previously. This process extends to other objects and real world applications, such as the controlling of electrical cable manufacturing and application in areas such as a television depot station, where static electricity must be managed and accounted for to avoid disruptions. Connect the voltage output into the circuit shown in Figure 2 9 steps 1 to 7 with voltage output set at 3 V Data 90 Q Resistor Apparent Resistance 9 Calculated Resistance 9 Maximum Resistance. This indicates the resistance increases as the length of wire increases. Therefore, if I was to do the experiment again I would improve the quality of equipment.

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Resistance in a Wire

resistance of a wire experiment

The values were ed using Law, considering that the voltage meter in use had an output of 2 :l: 0 and 4 i 0. Reducing the uncertainty in the results There are some factors that could affect the accuracy of my results in the experiment of the resistivity of copper wire. This would also alter the final value of the resistivity. However, it was still more severe than the change of volts. The Ammeter measures the current in amps flowing through the component, it is only able to work correctly if connected in series whereas the voltmeter measures the voltage in volts across the component and must be placed in parallel around the component under test. The standard abbreviation for electric resistance is R and the symbol for ohms in electric circuits is the Greek letter omega, Ω. An example of this is the resistance at 10cm which is 1.


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Resistance Wire Lab Report

resistance of a wire experiment

Comments on repeat readings My repeat readings all varied from the first readings but this was pretty constant with all the readings and was expected due to the rise in temperature of the wire as the experiment went on. The resistivity value itself did alter but mainly stayed constant throughout the experiment. The V is the battery voltage, so if R can be determined then the current can be calculated. Similarly, the range I will use on the voltmeter which is at 2V has an accuracy of ±0. It must have been from these two calculations where the uncertainty of the resistance became noticed. This is because by doubling the length of the wire one is also doubling the collisions that will occur, thus doubling the amount of energy lost in these collisions. So, resistance is how hard it is to move electrons through a wire.

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Measuring the Resistivity of Copper Wire of Different Lengths

resistance of a wire experiment

Therefore in the experiment, I would measure the volts and amps more than once in my preliminary experiment to determine any anomalous results. To conclude, this software would make an excellent addition to any school physics department. Furthermore in my actual experiment when we measured every 10cm along the 34 SWG Constantine wire. This would be a useful experiment to carry out alongside my other to support my theory and satisfy my aim. This is relevant to vast areas of technology today, including national electricity grids, power generation, design of all electronic devices and all electronic circuits, heating, electrical safety and understanding ofnatural phenomena such as lightning. The resistance did increase when the wire increased.

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Physics Lab typemoon.org

resistance of a wire experiment

When a circuit is switched off and there is no electric current present the atoms are able to move freely, producing good electrical conductors. However when it was at 100cm the difference was 7. It also depends on the temperature of the conductor. These are called non- ohmic resistances. This is clear as the wire extends 10cm the resistance enlarges. Results: These are the results I collected from the experiment carried out.

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