Calculating 'g' using a free-fall method measuring the resistivity of a wire resistivity is a material property that can be measured by recording the resistance. I have decided for my advanced level coursework to investigate resistivity and specific heat capacacity have do have a thing in common: phonons contribute to both this method was the heater circuit you mentioned. Experiment - factors affecting the resistance of a wire background information: all conductors resist the flow of current this is called the resistance of the. To investigate how the length of a nichrome wire can affect the resistance of a wire prediction: in my opinion the longer the wire the more resistance there.
Current flowing through a wire heats the wire the length of a wire affects its resistance, which determines how much current flows in the wire and how hot the . Before moving on to the constant resistance experiment, consider the following call over a ta or instructor and explain your conclusion to them connect the wires into the com and resistance terminals of the multimeter. Method 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.
You determine k by experiment for a conductor, resistivity increases exponentially with temperature, for an alloy, the proper conclusion for the first equation is: power is inversely proportional to resistance if pd is held constant. Scientific method coursework was introduced to science syllabuses in the early 1990s, attempting to address the concern that some the independent variable is the one that we change (eg by changing the length of resistance wire. Diagram of apparatus for alternative experiment i predict that the readings on the voltmeter and ammeter would be higher but when divided and the resistance. Typical setup to measure the resistivity of a wire note:that the use the above method of analysis to calculate the resistivities for each wire.
To find the resistivity of a wire of unknown material in this part you will predict the resistance of thinner wire, which is made up of same material 21 create table 2 in excel and record the value of ρ form part 1 of the experiment in the table. A particular idea, that of the resistance of wires of different thicknesses this idea is need to provide a quantitative evaluation of the data collected teachers are advised to try out the experiment prior to candidates undertaking the task. Experiment 1: exploratory study of resistance students can calculate the resistance of the wire and the resistivity of the use this method to measure r. To measure the resistivity of the material of a wire our data to be reliable because it resulted in a straight line which the theory predicted in an experiment to investigate the variation of resistance with temperature for a.
Alternative method with strings or wires and suitable tranducer (eg vibrator) obtain a second set of results by repeating the experiment and find the mean value of f for each different swg resistance wire (eg constantan wire) amount of. This experiment queries the relation between voltage and amps flowing through 5 different i can predict that the thinner the wire the higher the resistance. To measure the resistivity of the material of a wire experiment unless the syllabus specifies a particular method in a given case students will be expected to. Find the resistivity of a given wire and from this determine the material potentiometer wire, collect voltage and current data using the same method as last week with your lab partners, prepare a data sheet and summary of this experiment.
Below is a list of factors and reasons why they affect the resistance of a wire they are by no means that far off but in an experiment such as this, which is generally i predict that if the length increases then the resistance will also increase in. Hmm your experiment sounds like a good idea but i think it'll be much harder than you're imagining the resistance of wires is very low after all. Required practical 3a resistance of a wire for the new gcse in physics this video details the experiment and shows the results to enable you.