Resistance is a measure of how much energy is required to press the current through something.
In experiment one I am going to investigate how the resistance of a wire depends on its length. Most of the data points were on, or very close to, the line of best fit. HubPagesCopyright © 2020 HubPages Inc. and respective owners.As a user in the EEA, your approval is needed on a few things. This experiment will be focusing specifically on that last factor – length – and investigate just how much of a role a length of a wire would have on its electrical resistance by using a range of wire lengths to test with. There are two types of current: direct and alternating. However, using new pieces of wire each time would have been too impractical and time-consuming in the context of this lesson.
Copper, which has one of the highest conductivities, is the most commonly used metal in electrical wiring.Even small impurities in metals will increase their resistance. Music can make people cry, give them goose bumps, anger them, make them happy, and play with many other emotions. If you take a wire of different lengths and give each a particular potential difference across its ends. * Ammeter – measuring current of the circuit, with his and the voltmeter I will be able to work put resistance (R=V/I). This is because if you double the length of the wire you will double resistance, because the electrons just have twice as much material to pass through.For this I would expect an inverse line, as the cross sectional area increases the resistance decreases.Tables: Below are tables to show my results taken during the practical.A Table to Show Results Taken When Testing Length against ResistanceA Table to Show Results Taken When Testing Cross Sectional area of a Wire against ResistanceOn the previous pages are graphs I have drawn up from my results. For the length of wire I have decided to keep the wire at a constant width of 0.19MM, and for Cross sectional area a constant length of 50CM to ensure a fair test and to make my results accurate. Get to Know The Price Estimate For Your Paper "You must agree to out terms of services and privacy policy" I could have considered using a new piece of wire each time in order to regulate the temperature more stringently. I will test cross sectional area at the Cross sectional areas of wire: 0.028 mm2, 0.045 mm2, 0.057 mm2, 0.113 mm2, 0.166 mm2 and 0.246 mm2, keeping a constant length of 50cm. However, I think that unless I had specialist equipment the results would be distorted because the wire would eventually get very hot.
nevertheless this is a very good experiment report.Thanks a lot, this really helped me with my physics lab report. There are different ways to investigate the factors that affect resistance. Jonny Nelson explains resistance with a GCSE Physics practical experiment.Required practical - investigate the factors that affect resistanceThere are different ways to investigate the factors that affect use appropriate apparatus and methods to measure current and potential difference to work out the resistanceTo investigate how changing the length of the wire affects its resistance.Connect the crocodile clips to the resistance wire, 100 centimetres (cm) apart.Move one of the crocodile clips closer until they are 90 cm apart.Record the new readings on the ammeter and the voltmeter.Repeat the previous steps reducing the length of the wire by 10 cm each time down to a minimum length of 10 cm.Use the results to calculate the resistance of each length of wire by using R = V/I, where R is resistance, V is Plot a graph of resistance against length for the resistance wire.From the graph it can be seen that the longer the piece of wire, the higher the resistance. Requires practical: Resistance The resistance of the wire is directly proportional to the length. 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. @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!
Other product and company names shown may be trademarks of their respective owners. Overall, I think my method was sufficient to obtain reliable results.To support my prediction and conclusion, I could do further experiments.
Again, I will record the voltmeter and ammeter readings and turn off the power pack. This is because if the current passes through an amount of wire, the electrons will make a certain amount of collisions with the material, and resistance will be cause. In my main investigation I will see if this observation applies to my results.I found that the apparatus I used was suitable, but I think that I could possibly increase the number of data points to generate more reliable results, perhaps by increasing the length of the wire by 5cm each time, instead of by 10cm.I will investigate the resistance of a wire in relation to its length.I predict that the longer the wire, the larger the resistance. Please choose which areas of our service you consent to our doing so. However, due to my line of enquiry, I will only change the length of the wire. In experiment two I am going to investigate how the resistance of a wire depends on its thickness.
The longer the wire the less volts each centimetre of it will get.
Also, the apparatus I had use of at school would not be suitable if I were to keep increasing the length of the wire; e.g., in a classroom environment I could not increase the length to more than 150cm because of safety concerns as well as space constraints.I think my method could have been improved to produce results that were even more consistent.
The experiment has to be fair so that it is only length or thickness being altered and everything thing else which may affect the experiment is kept constant.