Ohm’s law Essay

Predictions 1. The longer the wire, the much it volition jibe the flow of electrons 2. The wider the wire the less guard it sh only come. 3. sloven go away be the wire which has the less resistance. 4. The diametric types of wire will have different levels of resistance. the true I am intending to also get a reading for the distance zero also victimisation the crocodile clips and keeping the circuit identical. This shall be my control. I suspect that there will be resistance both in the circuit wires and in the multimeters. This will mean that the measures obtained for resistance of the wire shall be slightly too high.By subtracting the resistance value of the circuit wire from the resistance calculations I will get a more accurate stria of guides. similarly as I intend to attain a best fit line for my results, if all the points ar slightly too high the gradient will be dramatically altered. The way in which the readings argon being taken is designed so that the rea dings are random but in an nifty way so that I can item any mistakes. Method Method used The method used was identical to that explained under the planning section, above. The results (i. e. readings on the multimeters), were taken down and put into tabulates. The results were as followsResults For atomic number 28 chromium wire, SWG 30 aloofness (cm) breadth (mm) sure Readings (Amps) emf Readings (Volts) T3Length (cm) Width (mm) accredited Readings (Amps) potency Readings (Volts) For nickel chromium wire, SWG 22 Length (cm) Width (mm) Current Readings (Amps) electric potential Readings (Volts) For copper wire, swg 30 Length (cm) Width (mm) Current Readings (Amps) Voltage Readings (Volts) learn 1 Try 2 Try 3 Ave. Try 1 Try 2 Try 3 Ave. For constantan wire, swg 30 Length (cm) Width (mm).Current Readings (Amps) Voltage Readings (Volts) For manganane wire, swg 30 Length (cm) Width (mm) Current Readings (Amps) Voltage Readings (Volts) Resistance values For atomic number 2 8 Chromium Wire, SWG 30 Length (cm) Current (A) Voltage (V) Resistance (? )For Nickel Chromium Wire, SWG 28 Length (cm) Current (A) Voltage (V) Resistance (? ) For Nickel Chromium Wire, SWG 24 Length (cm) Current (A) Voltage (V)Resistance (? )Patterns and trends It can be kind of clearly seen in most(prenominal) of my results that when a represent of continuance and resistance are plotted the result is a peachy line. In my case I have obtained a scatter chart with a very strong positive correlation. In chart 1 It can be seen that there are four straight lines avenueing through the origin. These straight lines are the values for Nickel Chromium at different gauges. The gauge values are as followsGauge Diameter (mm) graph two, it can seen that this is not a relationship of direct proportionality as the correlation doesnt point towards the origin. Also from graph one, it can be seen that the resistance increases as the length does. All these lines are straight and they all pass through the origin, so I recall it is earmark to conclude that Resistance is directly proportional to the length of the wire. Finally it can be seen from graph cardinal that the resistance in different types of wire varies correspond to the type.Keeping the gauge constant this was tested and the results were as follows Nickel Chromium is the most resistant, Manganane is the second most resistance, Constantan is third, And the least resistant is copper. All the depict her proves that my results agree with my hypothesis. (c. f. section P). Evaluation Reliability The reliableness of these results is quite good. This is because the procedure is relatively straight forward, and the poesy are not difficult to record. I think the results are certainly reliable enough to comport both of my conclusions firmly. Anomalus results.There are a hardly a(prenominal) anomalus results throughout the experiment. The resistance values in the table are not ceaselessly increasing, and this is n ot always occurring at a steady rate. Good role model of which are the readings for 40 and 50 cm on the copper wire. I think that this is just a mistake in taking down the results or possibly we didnt wait foe the voltmeter to stabilize. data-based errors These could include many things, the most likely of which are a short circuit, The wire may have heated up ca use less resistance, and the readings on the multimeters could have been inaccurate.Further relieve oneself This could include decision a more varied set of results, testing more types of wires. It could also include taking more readings to get better averages. I would suggest victimisation all the rest of the equipment in the same way. Also one could try to investigate temperature changes by using insulated wires and a tray of cold/warm or burning water. Show poke only The above preview is unformatted text This student written piece of work is one of many that can be raise in our GCSE Electricity and Magnetism secti on.