Evaluation No resistors are used in this experiment, causing the battery to short-circuit, draining all of its energy in just a short amount of time. These are the procedures I will take in order to make the investigation fair. Below is a table illustrating the effect of changing the variables (see Table 2):I will ensure experimental safety by confirming that all the wires are connected properly and that none of the insulation on the wires is worn. Below are sketch graphs for the results I expect to get:I will expect to get a straight line that goes through the origin; this will show me that Resistance and Length of wire are in direct proportion to each other. The utilitarian and loyalist... Law is a complex subject. There are a few data points that are farther away from the line of best fit than the others, but they are still consistent with the general trend. nevertheless this is a very good experiment report.Thanks a lot, this really helped me with my physics lab report. The 1st graph shows a straight line passing through the origin, this means that the two factors are in direct proportion (Resistance and Length of Wire). If you take a wire of different lengths and give each a particular potential difference across its ends. For cross sectional area I predict that the greater the cross sectional area, the less resistance, this is because there is more space for electrons to fit through the wire when it is very thick, and so there will be less collisions between the electrons and the wire, than when it has a small cross sectional area. Helped my year 9 coursework a lot. For example, the tiger wants to be “king of the beasts” so that he battles the current... My personal ethics are shaped by my training and responsibility as a sailor serving in the US Navy coupled with my duties and responsibilities as a Christian. This will reduce the chance of false readings and will cancel out any anomalous results. Resistance Experiment In this lesson, we will • Describe how to investigate the factors affecting the resistance of electrical circuits.
Allow the wire time to cool.
also offered here. The metal is full of "free" electrons that do not stick to any particular atom; rather, they fill the space between the atoms. The free electrons keep bumping into atoms. I will repeat this method every 5cm until I get up to 100cm, taking three readings from both the voltmeter and ammeter each time to ensure accuracy. We use cookies to give you the best experience possible. (2020, Jun 02). luv uVoted up :) Must be of great help for those students who are doing physics.Copyright © 2020 HubPages Inc. and respective owners. The results will help me make predictions, as well.Below are my results from the preliminary experiment (see Table 1). I will then turn the power pack on and record what voltmeter and ammeter readings. Doubling the length of a wire will double its resistance.A thicker wire means less resistance, as the electrons have a larger surface area to move through. While metals are good conductors, several properties affect how well a metal wire will conduct electricity. * Switch- A safety consideration, so the wire doesn’t overheat and burn if the circuit is left on for too long.I have decided to test length of wire at, 10cm, 30cm, 50cm, 70cm, 90cm, 110cm, 130cm, 150cm and 170cm keeping a constant cross sectional area of 0.028mm2. I could also consider using different cross-sectional areas of wires or even change the temperature of the wires deliberately and see how manipulating these variables affect the resistance of the wire.No HTML is allowed in comments, but URLs will be hyperlinked.
Overall, I think my method was sufficient to obtain reliable results.To support my prediction and conclusion, I could do further experiments. Music can make people cry, give them goose bumps, anger them, make them happy, and play with many other emotions. I am not doing temperature because it would be hard to get results from and I think they wouldn’t be as accurate.I will set up a circuit to find out how length and cross sectional area affect resistance.I will need the following components in my circuit to gather all of the necessary results:* Component holder- So I can change the wire that I am testing. The resistance of a wire causes difficulty for the flow of the electrical current of a wire to move and is typically measured in Ohms (Ω). This is because the free electrons in the wire bump into more atoms, thereby making it harder for electricity to flow. Read also does length of wire affect current essayFor cross sectional area of wire, as I predicted, the greater the cross sectional area, the less resistance, this is because there is more space for electrons to fit through the wire when it is very thick, and so there will be less collisions between the electrons and the wire, than when it has a small cross sectional area. Similarly, the shorter the wire, the smaller the resistance because there will be fewer atoms for the electrons to bump into, thereby easing the flow of electricity. Once again, thank you!Great help. @ehehfeelgood - the coursework is for GCSE students and those in secondary School.Thx but this is not good for year ones they can't read you know should have some picturesThis has helped me a lot in my y7 Science work Thank YouThanks! * Voltmeter- Measuring potential difference across the wire, it will have to be across the wire and not just anywhere in the circuit so it is measuring the P.D across the wire I am testing only. I know you stated it was Nichrome, and 100 cm long, but the SWG is not stated - Am using your data as secondary data and need to compare my investigation and yours.This is by far the beast source of information I could find for my coursework, you are awesome:)Thank you so much for this as it helped a lot in my physics class.really helpful for my physics contorlled assessmentYOU SAVED MY LIFE ANY FOR MY SECONDARY DATA CHEERS BIG TIMEThis was really helpful for my controlled assessment. Type of metal.
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