(Solved): need help PROCEDURE 1. Measure the resistance of R1. The color-code value is 2.7k.R1= 2. Con ...

PROCEDURE 1. Measure the resistance of $R_1$. The color-code value is $2.7\mathrm{k}\Omega .R_1=$ 2. Construct the circuit shown in Figure 6-1(a). Figure 6-1(b) shows an example of the circuit constructed on a protoboard, $R_2$ is a $10\mathrm{k}\Omega$ potentiometer. Connect the center (variable) terminal to one of the outside terminals. Use this and the remaining terminal as a variable resistor. Adjust the potentiometer for $0.5\mathrm{k}\Omega$. (Always remove power when measuring resistance and make certain you are measuring only the potentiometer's resistance.) (a) Figure 6-1 3. Use Ohm's law to compute the total current in the circuit. The total voltage is $+12.0\mathrm{V}$. The total resistance is $R_1+R_2$. Enter the total current in Table 6-1. The first entry has been completed as an example. 4. Measure the voltage across $R_1$ and the voltage across $R_2$. Enter the measured voltages in Table 6-1. As a check, make sure that the sum of $V_1$ and $V_2$ is equal to $12.0\mathrm{V}$. Then compute the power in $R_2$ using either of the following equations: $P_2=I_{\mathrm{T}}{R}_2\text{ or }{P}_2=\frac{V_2^2}{R_2}$ Enter the computed power, in milliwatts, in Table 6-1. 5. Disconnect the power supply and set $R_2$ to the next value shown in Table 6-1. Reconnect the power supply and repeat the measurements made in steps 3 and 4 . Continue in this manner for each of the resistance settings shown in Table 6-1. 6. Using the data in Table 6-1, graph the relationship of the power, $P_2$, as a function of resistance $R_2$ on Plot 6-1. Since resistance is the independent variable, plot it along the $x$-axis and plot power along the $y$-axis. An implied data point can be plotted at the origin because there can be no power dissipated in $R_2$ without resistance. A smooth curve can then be drawn to the origin. Plot 6-1 CONCLUSION EVALUATION AND REVIEW QUESTIONS 1. Observe the graph of resistance versus power for your experiment. Compare the resistance of $R_1$ and $R_2$ when power in $R_2$ is a maximum. 2. What was happening to the total current in the circuit as $R_2$ was increasing?