# resistivity lab report discussion The pattern on the graph supports the hypothesis of the experiment which predicted that if the length of the wire increased, the resistance measured would increase as well, the graph will observe a positive gradient with the mathematical function of y = mx + c which is supposed to display the increasing amount of resistance. The maximum error bar that can be identified there is the 4th independent variable, which was the 40cm wire, and the minimum error bar was located in the 1st data, which was the 10cm wire. The Physics Classroom, n.d. �Іnc�HC�5����:����?�#��ޡO�]0�8cx(;1Xb_�z��c:�)� T�q0AZ. Web. &. If one short wire has a resistance of 1 ohm, then 2 shorts wires would have a resistance of 2 ohms when connected in series. 2006. ! You already know that not everything conducts electricity equally well, and that some materials (like copper) resist Web. When electrons travel through wires or other external circuits, they travel in a zigzag pattern that results in a collision between the electrons and the ions in the conductor, and this is known as resistance. Title Experiment To Measure The Resistivity Of A Wire Author Mark Ian Dixon Last modified by Education Created Date 5/15/2011 8:45:00 PM Company Pre-installed Company Other titles Experiment To Measure The Resistivity Of A Gather materials and set up the circuit as shown in the experiment diagram above. The resistance of a wire causes difficulty for the flow of the electrical current of a wire to move and is typically measured in Ohms (Ω). A n a l y s i s F o r e a c h w i r e p l o t a g r a p h o f r e s i s t a n c e ( y - a x i s ) a g a i n s t l e n g t h . It is clear now that resistance is an important attribute that has been applied to many forms of technology to perform a useful function, and this experiment aims to see how we can control it. The investigation has concluded that there is a clear relationship between the length and the resistance of a wire, and that the former does in fact affect the latter. Science, English, History, Civics, Art, Business, Law, Geography, all free! �� q - v v � v v v v v � � � v v v v v v v ���� ���� ���� ���� ���� ���� ���� ���� ���� ���� ���� ���� ���� ���� ���� ���� ���� b v v v v v v v v v � � : Experiment To Measure The Resistivity Of A Wire Equipment: 1m of constantan wire of diameter 0.27 and 0.56 mm, 1m of nichrome wire of diameter 0.27 and 0.56 mm 12 V supply, 2 multimeters Procedure Take one of the pieces of constantan wire and record its diameter in three places using the micrometer screw gauge. Pre-lab Quiz/PHYS 224 Ohm’s Law and Resistivity Your name _____ Lab section _____ __ 1. Lab 2 - Lab Lab 5 - Lab Lab 11 Spherical Mirrors and Lenses Lab 8 Magnetic Field of a Slinky Solenoid Lab 2 Ohm's Law - lab report Lab questions - lab report Preview text Resistivity Course: PHY156 Section: 12919 Student Name: Gamoi Paisley Lab Partner: Asaba Anis Date: 09/26/2017 Objective: To determine the resistivity of a conductor, with a uniformed cross section, across its length. 2018. 2018. L e n g t h / m V o l t a g e / V C u r r e n t / A R e s i s t a n c e / W� C a r r y o u t t h e a b o v e p r o c e s s f o r t h e o t h e r c o n s t a n t a n w i r e a n d b o t h n i c h r o m e w i r e s . This limits the current through the wire in order to reduce any heating effect which m a y c h a n g e t h e r e s i s t i v i t y . May 8. The data does not perfectly fit the modelled best fit line as errors did occur along the experiment, as displayed by the rather large error bars over the datas. Get 150cm of nichrome wire and scrap or rub it with sandpaper in order to make it conductive. E5Ge0l&8�������#d ���n)��]s��*>J��rI�� ڊR�Г��x@ {O0 ��`Ի;�wv/�[��'�"1�Yȹ�}1K�pF^�:ppx��@�(�����}0�ȼ�����,��� ���� 5 5 5 8 m y \$ 5 � � � � � � H b n a c c c c c c \$ z | ~ � � � � � � � � � � � � � � � � � � � � � � � � ��`�� ��`�� ��^�� This was proven and supported by the trend-line in the graph which basically shows an positive correlation in the increase in resistance in the same rate as the independent variable increases, which is just as the hypothesis predicted. The resistance of a wire causes difficulty for the flow of the electrical current of a wire to move and is typically measured in Ohms (Ω). stream >> 7 0 obj /Type/XObject /ColorSpace/DeviceRGB Measure each wire by putting the points of both probes to the edges of the wires, and measure them four times/trials each. Set the power supply to 1V. Therefore, the longer the wire, the higher the resistance. It is therefore important to take note of the resistance when dealing with wires to supply power to a device or so. The datas for the length of wires (independent variable) were 10cm to 50cm with an increment of 10cm between each wire, while the resistance (dependent variable) seemed to display a lowest data of 3.48 Ω and a highest data of 8.48 Ω, which seems to fit well with modelled best fit line graph, which is visibly supported by the coefficient determination (R2) which states that the best-fit line fits the scattered data by 94.98%.