How the length of a wire affects its resistancein my physics coursework i am going to investigate the effect of the length of a wire on its resistance resistance is the measure of how easy it is for current to flow through a wire current is the rate. And record its diameter in three places using the micrometer screw gauge calculate the average set up the circuit as shown in the diagram set the power supply to 1v this limits the current through the wire in order to reduce any heating effect which may change the resistivity 2) record the readings on the ammeter. The same voltage was used throughout the experiment the same apparatus-for example voltmeter, an ammeter, wires, variable resistor, power pack and crocodile clips the same ruler was used to measure the wire each time safety in this experiment i made sure before i started that there was no water around my. The classic physics experiment this was designed as an intro for an isa but could be used for this practical in any syllabuss it includes model results, info on variables , anomalous data and graphs. So i will use 20, 22, 24, 26, 28, 30 and 32 swg wires for my experiment measure resistance apparatus metre rule wires with different thicknesses 6v battery ammeter voltmeter (0 to 10v) crocodile clips 5 connecting leads heat proof mat i do not know how big the current will be so i will start by using.
Student experiment: measurement of resistivity complete this section by asking your students to measure the resistivity of several metal wires this experiment provides an opportunity for a detailed discussion of the treatment of experimental errors tap 112-3: measuring electrical resistivity student questions: using these. Determination of resistivity of a wire using a micrometer, ammeter and voltmeter nb this worksheet gives full details of the experiment, primarily for use by teachers and technicians who may be unfamiliar with the experiment the worksheet would normally be adapted for student use to provide opportunity for students to. You need to explain your results using scientific information about resistance from your answers to the “a model for resistance of a wire” sheet you need to identify any outliers on your graph if there aren't any, say so in your report you need to evaluate your experiment try to give reasons for any outliers and. 1564 words - 6 pages gcse physics coursework - resistance of a wire coursework resistance of a wire task to investigate how the resistance of a wire is affected by the length of the wire theory what is resistance electricity is conducted through a conductor, in this case wire, by means of free electrons the number of.
The independent variable is the one that we change (eg by changing the length of resistance wire) the dependent variable changes in response (eg the resistance increases) the control a free-fall experiment involving dropping a ball bearing through a viscous (gooey) liquid may give these results: 101 s, 102 s, 99. Carry out an investigation of the relationship between the length of a metallic conductor (eg nichrome wire) and its resistance i found relevant information in my book about resistance, such as the fact that resistance is governed by the formula v = ir and is measured in ohms ohms can be measured using a multimeter.
Investigating factors affecting resistance of a wire essay - investigating factors affecting resistance of a wire aim --- investigate what factors affect the resistance of wire essay about the resistance of a wire - the resistance of a wire all conductive materials have a resistance when electricity is passed through it. Physics coursework title 2017 using conductors made of children's play ( modelling) dough, investigate quantitatively the effect on resistance, calculated from measurements of voltage across and current through the conductors, of changing the conductor length and obtain data to establish whether dough colour has an. It proved that changing the length of a wire does indeed affect the resistance flowing through it in a positive proportional way and although there is room for further investigation into some areas certain limitations have prevented this i have used ohms law as a guide and related my experiment to itread more this student. Experiment 17 temperature coefficient of resistivity 1 introduction resistance of any material varies with temperature for temperature range that is not too great example, nichrome wire, used as a heating element in most space heaters, practically does not straight line drawn through the experimental points find α.
Resistance of a wire materials can be classed as either electrical conductors or insulators insulators block or hinder the flow of electrons through them they ' resist' in order to test how the resistance of a particular material is related to its length and cross sectional area, an experiment in two parts must be conducted. 115mm was used to establish the practicality of using the material, and to test not associated with the experiment were kept away (a risk assessment was no wires less than 20 cm in length were used resistivity values the resistivity values (ohmm) of the materials used: copper 168 x 10–8 nichrome 11 x 10–6 to. An electron traveling through the wires and loads of the external circuit encounters resistance resistance is the hindrance to the flow of charge for an electron, the journey from terminal to terminal is not a direct route rather, it is a zigzag path that results from countless collisions with fixed atoms within the conducting.