Table 3.4: Resistivity of aluminum Wire Radius Wire Radius (mm) (m) Cross-sectional Area, r² (m²) Wire Resistance Length (Ohms) (m) Slope of Resistance vs. Wire Length:_ Resistivity of aluminum (Slope x Cross-sectional Area): % Error (Theoretical resistivity of aluminum is 2.65x10-8 Ohm-m): 2. Fill in the summary Table 4 below with the experimental resistivities calculated from the slopes of your graphs, and the % error:

A current of 0.167 A is flowing through an unknown resistor. The voltage drop across the resister is 2.24 V. Calculate the resistance of the resistor. Express your answer to three significant figures. The Resistance in the circuit is Ohms

Use Kirchhoff's Laws to calculate the theoretical current, voltage, and power through each circuit element. It is necessary to use Kirchhoff's Laws and not equivalent resistance. Include a clearly labeled diagram of the circuit with the calculations. Set up all equation symbolically and show all work.

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1. Does the resistance of all substances increase with temperature? Explain. 2. What is the temperature coefficient of resistance, and what are its units? 3. Are the a of a metal conductor and the B of a thermistor the same? Explain. 4. What the circuit conditions when Wheatstone bridge is are a "balanced"? 5. Assuming that B remained constant, what would be the resistance of the thermistor in the experiment as the temperature approached absolute zero? 6. What characteristics of the thermistor make it flexible a temperature transducer?

Four resistors are connected in a circuit as shown in the diagram below. What is the equivalent resistance of the system given that R1 = 400 Ohms, R2 = 410 Ohms, R3 = 380 Ohms and R4 = 249 Ohms

Assume the resistor you were investigating was a rectangular platemade of copper (Fig. 6); how would you determine its resistivity?

What is the total resistance of a circuit if 3 resistors, R1 = 91 ohms, R2 = 66 ohms, R3 = 44 ohms, are wired in parallel?

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