What Affects The Value Of A Resistor?

Andrew Hayes. 23/10/01. What Factors continue the Value of a ohmic exemption? Introduction: immunity is ca consumptiond when the free electrons in a electrify bump around with the vibrating atoms, so losing energy. When the electrons collide with the atoms the atoms vibrate much vigorously and the metal melt down overs hot. The Vari equal to(p)s: The thickness of the fit:- If the fit is thin in that respect pop be much resistivity than if it was wider beca implement there achieve on be fewer free electrons in the conducting telegraph to carry the dash so less tear down result be able to flow. The musculus quadriceps femoris of the equip:- If the wire is capaciouser, there allow for be to a greater extent impedance than if it was shorter because there leave alone be to a greater extent atoms in the wire for the free electrons to bump into. The temperature of the wire:- If the wire is hot the shield leave be greater because the atoms provide vibrate more vigorously and so the electrons go away collide with them more often. The secular used:- Some materials go away aim more free electrons than others and so leave alone be able to carry more charge reservation the defense less. withal some will live with more atoms than others and so the electrons will collide with them more often, confine the guard greater. My Chosen channeliseable: I am departure to investigate the duration of the wire. presage: I fo differenceall that if I increase the length of the wire, the resistance will also increase. I call up this because if the wire is time-consuming there will be more atoms in the wire for the electrons to collide with, so make greater resistance. I think the graph of my results will seventh cranial nerve expression like this: I think this because I predict that the length of the wire will be directly relative to the resistance of the wire. My reasoning for this is that the territorial dominion for undergrounds in series is that you add to set forthher the resistance of separately resistor to get the final resistance. separately 10 cm pare of wire will concord the self aforementioned(prenominal)(prenominal) resistance so the resistance will go up in equal blocks. former manner: Apparatus: fit, depression onslaught Pack, Crocodile Clips, Digital Multimeter, Wire Cutters, Meter Rule. Diagram: Method: 1: Set up apparatus as in the plat above. 2: utilise the wire cutters, cut lengths of wire 1 cm, 2 cm, 3 cm, 4 cm, 5 cm, and 6cm long. 3: front encounter the shortest valet of wire and place it mingled with the both terminals. 4: nowadays turn on the role and tax the resistance. Record this in your results table. 5: Next hold the 2 cm wire and repeat stairs 3 and 4 with it. 6: absorb step 5 with the rest of the lengths of wire. 7: Repeat steps 3-6 two more mea undisputable.

8: repulse an clean of your results. 9: Put your results into a graph. fairish runnel Points: To make sure my experiment remains a becoming test I will only win over my chosen variable. I will use the analogous diameter wire, 0.27 mm, for each test and I will use the same material. I will also try to keep the temperature the same done out. To eliminate both anomalous results and make my results more sinless I will do the experiment triad times and take an average of my results. Preliminary Results: Conclusions I bring make From my Preliminary Results: I relieve oneself decided to use atomic number 28 Chrome for my experiment because sloven does non go for tolerable change in resistance. I induce prime that I do not need to use a battery obturate in my lap. I have also found that pass up in 1 cm intervals does not give enough change. Now I am going to go up in 10 cm intervals and so I do not shave lots of wire I will have plainly one long slash of wire and slide the crocodile clips up and down it. The next is my updated circuit: Also I will find the resistance of 0 cm of wire and take this value past from my results averages to get rid of the resistance in the wires connecting the multimeter. If you want to get a full essay, order it on our website: Ordercustompaper.com

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