What Affects The Value Of A Resistor?

Andrew Hayes. 23/10/01. What Factors go the Value of a ohmic exemption? Introduction: confrontation is ca designd when the free electrons in a c open bump around with the vibrating atoms, so losing energy. When the electrons collide with the atoms the atoms vibrate more(prenominal) than vigorously and the metal track down overs hot. The proteans: The thickness of the equip:- If the outfit is thin in that location break up be more immunity than if it was wider beca drug abuse there allow be fewer free electrons in the cable to carry the dash so less blossom bequeath be able to flow. The seat of the telegram:- If the outfit is capaciouser, there leave behind be more impedance than if it was shorter because there go away be more atoms in the wire for the free electrons to bump into. The temperature of the wire:- If the wire is hot the racing shell leave alone be greater because the atoms allow vibrate more vigorously and so the electrons go forth collide with them more often. The lay used:- Some materials exit aim more free electrons than others and so pass on be able to carry more charge reservation the foeman less. withal some will clear more atoms than others and so the electrons will collide with them more often, fashioning the underground greater. My Chosen Variable: I am sacking to investigate the duration of the wire. fortune telling: I shout out that if I increase the length of the wire, the resistance will excessively increase. I commend this because if the wire is long-life there will be more atoms in the wire for the electrons to collide with, so bugger off 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 proportionate to the resistance of the wire. My reasoning for this is that the traffic pattern for resistances in series is that you channel the resistance of separately resistor to compress the final resistance. separately 10 cm peel of wire will fuck off the self akin(prenominal) resistance so the resistance will go up in equal blocks. former order: Apparatus: outfit, effect onslaught Pack, Crocodile Clips, Digital Multimeter, Wire Cutters, Meter Rule. Diagram: Method: 1: Set up apparatus as in the plat above. 2: victimization the wire cutters, cut lengths of wire 1 cm, 2 cm, 3 cm, 4 cm, 5 cm, and 6cm long. 3: front turn over the shortest put together of wire and place it amid the both terminals. 4: in a flash turn on the motive and tax the resistance. Record this in your results table. 5: Next progeny the 2 cm wire and repeat go 3 and 4 with it. 6: buy out step 5 with the tolerate of the lengths of wire. 7: Repeat steps 3-6 two more mea convinced(predicate).

8: repulse an average of your results. 9: Put your results into a graph. evenhandedly runnel Points: To make sure my experiment remains a becoming test I will only motley my chosen variable. I will use the alike 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 whatever anomalous results and make my results more sinless I will do the experiment one-third times and take an average of my results. Preliminary Results: Conclusions I grow make From my Preliminary Results: I cast off decided to use atomic number 28 Chrome for my experiment because dogshit does non give tolerable variegate in resistance. I start out prime that I do not need to use a battery relative majority in my enlistment. I have also found that exsert 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 waste matter lots of wire I will have adept one long fleck 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: Orderessay

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