Thanks, this helped me with my investigation in Physics, I was really confused about it. This was really helpful for my controlled assessment. Ensuring Accuracy To ensure accuracy I will record the voltage and the current three times every 5cm and take the average reading. Look in the table for material resistivity for commonly used materials. To measure the resistivity of constantan. Again, I will record the voltmeter and ammeter readings and turn off the power pack. Metal resistance decreases as temperature falls.
This is because the free electrons in the wire bump into more atoms, thereby making it harder for electricity to flow. Sep 14, The Resistance R is the resistance wire constantan nichrorome that you will be trying to calculate. Set up the apparatus as shown in fig. Leave your email and we will send you an example after 24 hours However, I made sure that the wire remained straight throughout the experiment.
Is to find out what factors affect the resistance of a constantan. Temperature change and resistance — Practical Physics is repeated with the coil in a water bath so that its temperature remains constant, the characteristic graph is a straight line, showing that the resistance remains constant.
No data is shared with Facebook unless you engage with this feature. Variables There are different variables that can be changed in this experiment; these are the independent variable. This service allows you to sign up for or associate a Google AdSense account with HubPages, so that you can earn money from ads on your articles.
This is used to provide data on traffic to our website, all personally identifyable data corsework anonymized. Table 3 shows that redistance the length of the wire increases, the resistance increases, as well.
We will write a custom paper sample on The resistivity of Constantan specifically for you.
Measure cougsework diameter of each wire using a micrometer and then measure their lengths in metres. Once you know the resistivity of a conductor and its dimensions you will always be able to predict its resistance. This is used to display charts and graphs on articles and the author center.
Resistivity Of Constantan Wire Coursework – | Viver, Aprender
The resistivity of Constantan Paper. The following equation can be used to calculate the resistance of a wire: Stretch the wire enough to remove any kinks or 39;slack 39; in the wire.
There are different variables that can be changed in this experiment; these are the independent variable. Note the voltage and ensure the scale of volts used does not exceed this as the wire will get too hot. This is used to provide traffic data and reports to the authors contsantan articles on the HubPages Service.
Resistane will make sure to site it and give you full credit! Pure metals do obey Ohm 39;s law when their temperature remains constant. Add this document to collection s.
Electrical resistivity Nichrome and Constantan are often used as resistance wire. The micrometer is used to measure the diameter of the constantan wire. The resistivity values ohm.
We take your protection seriously. Because constantan has a higher resistivity than copper, AS Physics Coursework – Resistivity in a wire. The constantan electrical resistance wire is a type of resistance alloy that is mainly produced using copper. Postage and packing are also very reasonable – Their details are as follows: ComScore is a media measurement and analytics company providing marketing data and analytics to enterprises, media and advertising agencies, and publishers. To ensure accuracy, I have taken three readings each of volts and current.
The equipment used was limited as to how accurate the readings could be with the accuracy being i?? Furthermore, if you double the length of the wire, the resistance is roughly doubled. I will also control, using the power pack, how many volts pass through the wire.
Experiment To Measure The Resistivity Of A Wire
It was noted that all the experimenters present found they calculated a lower value for the 30 S. There are possible sources of error that might have led to inconsistent results, such as a kink in the wire.
I will also ensure that the wire does not heat up too much by confirming that I do not set the voltage too high on the power pack and by maintaining the same the voltage for every reading.
The electrical resistance of a wire would be expected to be greater for a longer wire, less for a wire of larger cross sectional.
I found that the resistance increased as the thickness of the wire decreased, however, when I did the test with the copper nbsp; Measurement of the resistivity of the material of a wire of the leads when the crocodile clips are connected together.