The opening screen of the simulation shows the symbols for the three variables you will be studying. V stands for voltage, I stands for current, and R stands for resistance. The size of these letters in the equation represents the magnitude of each of the variables and can be used to show how the variables are related. On the right side of the screen are sliders to regulate the voltage and the resistance. The default voltage is 4.5 V, and the default resistance is 500 Q. The circuit is shown on the lower left of the screen. The voltage is represented by the batteries shown on the top of the circuit. The resistance is represented by the red cylinder at the bottom of the circuit. The arrows show the direction the current flows, and the amount of current is shown in the middle of the circuit. 1.5V 1.5V 1.5V 0.1 V current = 9.2 mA V=R V R voltage resistance 4.5 V 500 1. The default voltage is 4.5 V. Move the slider for voltage up and observe the changes in the circuit and the equation. Answer Questions 1 and 2 on your assignment worksheet. 2. Move the voltage slider back to 4.5 V and increase the resistance by moving the resistance slider up. Observe the changes in the circuit and the equation and answer Questions 3 and 4 on your assignment worksheet. 3. Move the sliders for voltage and resistance to produce the SMALLEST current possible. Answer Question 5 on your assignment worksheet. 4. Move the sliders for voltage and resistance to produce the HIGHEST current possible. Answer Question 6 on your assignment worksheet. In this part of the investigation, you will observe the changes in the current when you keep the resistance the same and change the voltage. 1. Set the resistance slider to 10 Q. Set the voltage slider to 1.0 V and record the voltage and the current in the data table on Question 7 of your assignment worksheet. 2. Move the voltage slider to 2.0 V and record the current in the data table on Question 7 of your assignment worksheet. 3. Increase the voltage by 1.0 V increments and record the new current until the voltage reaches 5 V. 4. Repeat Steps 1-3, but set the resistance to about 300 2. If you cannot get it to exactly 300 2, get it as close as possible. Record the data on the data table on Question 8 of your assignment worksheet. 5. Repeat Steps 1-3, but set the resistance to about 700 Q. Record the data on the data table on Question 9 of your assignment worksheet. 6. Answer the conclusion question on Question 10 of your assignment worksheet. 1. Describe what changes in the circuit as the voltage is increased. 2. Describe what happens in the equation when the voltage is increased. What do those changes illustrate? 3. Describe what changes in the circuit as the resistance is increased. 4. Describe what happens in the equation when the resistance is increased. What do the changes illustrate? 5. How do the sliders for voltage and resistance need to be moved to produce the SMALLEST current? 6. How do the sliders for voltage and resistance need to be moved to produce the LARGEST current? Part 2: Quantitative Relationship Between Variables 7. Data Table for First Resistance. Above the table enter the resistance that you used and then fill in the table. Resistance = Voltage (V) Current (mA) 8. Data Table for the Second Resistance. Above the table enter the resistance that you used and then fill in the table. Resistance = Voltage (V) Current (mA) 9. Data Table for the Third Resistance. Above the table enter the resistance that you used and then fill in the table. Resistance = Voltage (V) Current (mA) 10. Use data from the investigation to describe the relationship between voltage, resistance, and current. 1. When using the equation V = IR for calculations, the units for current (1) should be amps (A), not milliamps (mA). There are 1,000 milliamps in an amp, so to convert from milliamps to amps, divide the number of milliamps by 1,000. In the table below enter the information from the table in Question 7 and convert the mA to A by dividing by 1000. Voltage (V) Current (mA) Current (A) 2. Create a graph with the current in amps on the x-axis and the voltage on the y-axis. Insert the graph in the space below. 3. Determine the slope of the line. 4. Compare the slope of the line to the constant resistance that was used to create the data table in Question 7. 5. Based on your answer to Question 4, describe the relationship between resistance, current, and voltage.