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# Investigation 2 – PostLab

### ANALYZE IT

• Complete the Analysis Questions in your SDR then discuss them as a class.

1. Calculate the amount of resistance supplied by (a) the single resistor, (b) the two resistors in series, and (c) the two resistors in parallel. Record the resistances in Table B. Use Ohm’s law for the calculations.

2. Question: Study Table  B.    How does the resistance of the two resistors in series compare to the resistance provided by the single 1000 Ω resistor?

3. Question:   How does the resistance of the two resistors in parallel compare to the resistance provided by the single 1000 Ω resistor?

4. Question: Look at how resistance and length change when resistors are in series. How do changes in the length of a resistor change resistance?

5. Question: Look at how resistance and cross-sectional area change when resistors are in parallel. How do changes in the cross-sectional area of the resistor change resistance?

### GET FOCUSED

Complete the Focus Questions in your SDR then discuss them as a class.

• What is the relationship between voltage, current, and resistance?

• How do the dimensions of a resistor affect current? Use your data to explain your answer.