Unit $11$ Progress Check: FRQ $3$

Show all your work for each part of the question. The parts within the question may not hav

Figure $1$

A group of students has an approximately one$-$meter long resistive wire, as shown in Figure $1,$ and they wish to determine the resistivity $$ of the wire. The wire has a uniform, circular cross section.

$($a$)$ Describe an experimental procedure to collect data the students could use to determine the resistivity of the wire material. Provide enough detail so that the experiment could be replicated, including any steps necessary to reduce experimental uncertainty.

$($b$)$ Using the data collected in the procedure you described in part $($a$),$

describe how the students could create a linear graph from which the resistivity of the wire material could be determined, and

describe how the resistivity could be determined from the graph.

rigure $2$

following day, the students are given a nonideal battery, and they wish to determine the battery's emf. $7100$ have a voltmeter with which to measure the emf directly, but they do have two ammeters $A_1$ and $A_{2}r$ are able to use the resistive wire from the experiment in part $($a$)$ to make a variable resistor, and also hi gure $2,$ in which the resistive resistance $R_1=50\mathrm{.}0$

he students record the readings $I_1$ and $I_2$ frombere resistum ammet

$10$wn in the table.

AF

Cellosokents

Unit $11$ Progress Check: FRQ $3$

Show all your work for each part of the question. The parts within the question may not hav

$$

A group of students has an approximately one$-$meter long resistive wire, as shown in Figure $1,$ and they wish to determine the resistivity $$ of the wire. The wire has a uniform, circular cross section.

$($a$)$ Describe an experimental procedure to collect data the students could use to determine the resistivity of the wire material. Provide enough detail so that the experiment could be replicated, including any steps necessary to reduce experimental uncertainty.

$($b$)$ Using the data collected in the procedure you described in part $($a$),$

describe how the students could create a linear graph from which the resistivity of the wire material could be determined, and

describe how the resistivity could be determined fromthe graph.

Figure R$=50$ohms.whats the emf. Graph the points