Question

Not too sure what my professor wants me to put down here... if you could help me with an outline and some examples from my points that would help.. thanks

3. You will have this question most every lab) On separate lines list each measurement name, average (or representative) value tuncertainty (state as readability reason for uncertainty) EXAMPLE Distance between t0024 lml each repeated the measurement four times and this was our (uscertainty) which came parallax.) Don't listan the measurements as if this were adata table.Instead,just list the measurement types some of them are headers of your dauuble, others might be constants listed above or below the data table Here is what you should include: ar... Length Resistivity (0) with uncertainty and uncertainty formula. to about each measurement type some sample value or rage, how you obcained it, the umoeraity or bow well you knew ie value and you estimated that uncertainty You should have four or five lines for your answer. for eand de value for de relative uncertainty and you mast how eemathemasealegre sie" ane get the relative uncertainty (for that expression, do not use the values,but the variable names insad) For will to use proper formatting: se greek letters, if required: to within t000 Diameter of wire was meavaeed New in S 4 What is the relationship between resistivity awl conductiviyt command opwon command

Answer 1

Answer:

The formula for resistivity is,

$\rho =R\frac{A}{l}$

where R is the resitance, A is the area of cross section, and "l" is the length of the wire.

Now, coming to the questions, you first have to assume a value for the diameter of the wire with uncertainties, and then have to find the area from that. (e.g. you can take the diameter of the rod as; 0.1 $\pm$ 0.001 [mm].

Then, for the first table, you have to write the length of the wire. Assume the wire knocked with 4 screws, from starting to end. and write the part lengths. You can also make four equal parts to the length. (e.g. 25.2, 25.1, 25.0, 24.8 m for a 100 m long wire, with uncertianties in each value).

Rest what you have to do is that assume 5 experimentally measured lengths to the wire ( all must be same approximately), use that to find the resistance in each case.

In the final table, you have to put all your assumptions in length, corresponding calculated values of resistance, and then do what you are asked to (as you have wrote the points in the tables), plot points, find out the resistivity, and also check for the linearity of the graph. If not, make best fit, find out slope, and intercept.

** All the assumed values must be accompanied by an uncertainty (as insisted by your professor).

**You just make some wise assumptions for length of wire, and its parts as per my taken example, and the rest you have done nicely.