# Student Portal:

# Electricity and Magnetism

# 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.