To measure the resistivity of the material of a wire apparatus length of wire (nichrome, manganin), micrometer, ohmmeter, metre stick resistance of leads = micrometer zero error = average of micrometer readings = diameter of wire = average value of ñ = notes safety glasses should be worn as the. This will enable you to use and interpret the graph to find the resistivity of nichrome safety check electrical equipment for loose wires and connections 1 for this experiment you will need: a length of nichrome wire and a metre ruler a micrometer a power supply, voltmeter, milliammeter, 2 4 mm plugs to be used as. Copper wire is often used as it is stretched by weights hung over the edge of the bench, with the small extension carefully measured with a ruler wear eye protection resistivity is a material property that can be measured by recording the resistance of various lengths of wire of a known cross section make sure that you. Resistance time 40 minutes safety adult supervision is required ask an adult who is knowledgeable about electricity to help you please click on the safety icon of the wire in this experiment, you saw how thickness affects resistance and how it can be used to produce bulbs of different brightness the thinner the wire,. Resistance in a wire coursework in this investigation we are trying to look for resistance in a piece of wire, and how the length of a wire can increase or decrease the resistance the things that affect the resistance in a wire are: • the length of the wire • a certain amount of wire • cross sectional area of the. Mr habgood shows you how to measure the resistance of a wire when you change its length.
In this experiment you will explore how different types of wire affect the flow of electricity through them and practise using an ammeter in a circuit to to measure electric current if the meters are deflected full scale then one way to reduce the deflection is to place a resistor such as a light globe in series in the circuit redraw. Do not switch on the power pack when there is no resistant wire (putty) and do not turn the power supply up too high, because normal laboratory wires may melt, and so might the putty do not handle experiment with wet hands place asbestos mat underneath putty for safety place a variable resistor in the circuit for. Resistance in metal wires experiment number 136060-en topic electricity version 2017-02-27 / hs type student exercise suggested for grade 7-10 p 1/ 4 frederiksen scientific a/s tel +45 7524 4966 [email protected] viaduktvej 35 dk-6870 ølgod fax +45 7524 6282 wwwfrederikseneu objective.
Variables: in my experiment, i will be measuring how the resistance of the wire changes, so resistance is my dependant variable my results by allowing me to identify anomalous results so i will take care with the fire and be safe around it by following all the safety guidelines calculate the resistance at each temperature. Resistance in a wire free essay example: how the resistance of a wire is affected by its length this investigation will determine how changing the length of the wire, when passing an electrical to follow safety precautions correctly the wire must be carefully monitored and contact avoided when thermal energy increases.
Carry out an investigation of the relationship between the length of a metallic conductor (eg nichrome wire) and its resistance length of wire pliers multimeter meter stick safety glasses lab coat connecting wires crocodile clips if we were to do this experiment again, we would ensure three 'good' results. Strength which itself depends on the voltage and body resistance ie path length and surface resistance of skin (which is much reduced when wet) death can be the result of the normal voltage of 240 v causing currents of familiar with safe operation the risk of injury is therefore likely to be slight although any injuries that. We got just given our coursework in college and i am utterly clueless on what to do for this i'm supposed to be investigating how changing the length of the wire in a circuit affects its resistance and then calculating the constant resistivity of that wire afterwards can anyone help me out here how do you set. They will report on the results of a practical experiment with parallel circuits the report will provide each group with a power pack, three resistors of significantly different resistance, an ammeter, a voltmeter, and connecting wires choose resistors make appropriate inferences from the data about safety for example.
Class practical a simple investigation of the factors affecting the resistance of a wire when using a power supply, high currents will cause the safety cut-out on the power packs to automatically switch it off if short lengths 5 how science works extension: this experiment can be used as a more open-ended investigation.
Purpose the purpose of this investigation is to investigate whether variations in cross section areas of a wire (conductor) will affect its resistance i will be performing therefore, the length and material of the wire, as well as the temperature of the environment the experiment is conducted are controlled the output ftom. Investigating how the resistance of a wire varies with its length you will use r = v/i to calculate resistance and then plot a graph with length of wire (cm.
A circuit with a cell and two lamps has high resistance and low current a circuit with a cell, switch, lamp and ammeter connected in series the resistance of a thin wire is greater than the resistance of a thick wire because a thin wire has fewer electrons to carry the current the relationship between resistance and the area. Changing the conductor length and obtain data to establish whether dough colour has an effect on its resistance part 1 (introduction) (i) statement or problem to be investigated what (i) safety (you need at least two safety precautions) these must be specific to this project not general lab rules such as bags outside lab. Paper • open access characterization of copper and nichrome wires for safety fuse to cite this article: e murdani 2016 j phys: conf ser 776 012099 from this experiment, it will be obtained the dependences wire resistance to temperature (melting temperature and ambient temperature), the type of wire and. In a “used components” box on the bench under where the resistors/wire reels are stored and safety issues activities to include reading resistor values, identifying capacitors (inc electrolytic) and diodes, introduction to ic packages – particularly (nb this leads on to the concept of impedance in experiment a2.