# nichrome wire resistance experiment

This causes the voltage of the wire to increase causing a higher resistance. The circuit itself can resist the flow of particles if the wires are either very thin or very long.

Batteries, the mains, dynamos and electrical generators provide the energy to force electrons around electric circuits. 2 I will use 2 different lengths of wire in my preliminary, the largest 100cm and the smallest 10cm so I can find the material with the largest resistance range. Physics Coursework Investigating Resistance of wires and its relationship to length. Another class, Archaeological with flood plains effected by the, Tess form tension, conflict, or even war between, Phukubje Stated that learning disability (LD) is. A0.

Low voltage power supply, rheostat, voltmeter, ammeter, length of nichrome wire. Factors to control The independent variable will be: 1 The amount of resistance in different lengths of wire. The equation for resistance using resistivity is Resistance = resistivity x length / area of cross section of the wire The resistivity of Nichrome at 250C is 100 x 10-8 ohm-m. Frog Thor Wiki, Iowa State Cyclones Jacket, Losing Someone To Alcoholism Quotes, This shows that human carefulness was a key factor for producing the results. JavaScript seem to be disabled in your browser. However, collisions occur with the electrons and the positively charged ions in the lattice and so the wire has shown resistance against the current as the movements of the electrons are being obstructed. 2 Data 3-46. The result is the voltage of the wire increases. With these instruments, I will set up the diagram shown. Also if the atoms in the material are closely packed then the electrons will have more frequent collisions and the resistance will increase.

Since the cross-sectional area of the wire can be found by knowing its diameter. Although the crocodile clips made it easier for me to measure the length of the wire however I found it very difficult to keep the wires in these clips since it kept slipping out so the wire wouldnt get connected successfully to the circuit. Cross sectional area- The cross sectional area of the wire does not have to be controlled, because of the fact that the wire is industrially produced and will have the same cross sectional area throughout its length, because of the high accuracy levels of production on an industrial scale. SWG Diameter Resistance per Copper metre/ohm Nichrome 26 0.457 0.105 6.27 28 0.376 0.155 9.28 30 0.315 0.221 13.2 32 0.274 0.292 19.4 34 0.234 0.402 24 In order to make my final decision I did some trial tests myself. We must try to keep the current low enough to avoid the heating effect, which may burn us or cause damage to surrounding objects. To find the area of a cross section of the wire i use the equation for the area of circle Area of circle = ? 0 Conclusion In recreating an experiment for Ohm’s Law, it is proved that as temperature increases so does the resistance. The longer the length of the wire, the higher the resistance. Precaution was taken so that the Nichrome wire would not hurt the finger. Smashing Pumpkins - Gossamer, Note:that the Battery/Cell and rheostat (variable resistor) can be replaced by a variable Power supply Equipment. The readings on the ammeter and the voltmeter went up as the power input went up. This is because the number of electrons depends on the amount of electrons in the outer energy shell of the atoms, so if there are more or larger atoms then there must be more electrons available. Switch the circuit off and allow for the nichrome wire or light bulb to cool, Increase the power supply setting by one and record the result from the ammeter and voltmeter, Continue to increase the power supply in steps of one until power supply is at its highest, Do this until four tables have been collected Patrick Doan2. Temperature will be controlled by keeping the current roughly 1 amp. 000. I will need to use a wire with large resistance range that is a good conAmmeterVoltmeter ductor of electricity. Cobb Tuning Locations, * Make sure when measuring the lengths 1cm is added to the total length: As the crocodile clips take up space on the wire, The thinner the wire is the less channels of electrons in the wire for current to flow, so the energy is not spread out as much, so the resistance will be higher: We see that if the area of the wire doubles, so does the number of possible routes for. The Starch Solution Meal Plan, The current is the flow of free electrons through the circuit, and the voltage is the driving force that pushes the current around the circuit. I will also try and use the same equipment for each current because any change of equipment might cause a distortion of results. Temperature of the wire. Learn more. We could do other investigations such as; using a different thickness of wire and a different material of wire (to see if the same results apply to copper wire). Su Men's Bball Tickets, These are the results obtained from the experiment. In doing this experiment, we must take many safety considerations into hand. It would have been ideal for me to have used a digital voltmeter of range 0-2 V but this type of voltmeter was unavailable. Don't have an account yet?