pre-lab preparation sheet for lab 4—batteries, bulbs, and current

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4. To begin, set up the circuit in Figure 4-8b. Begin graphing, and try closing the switch for a couple of seconds and then opening it for a couple of seconds. Repeat this several times during the time when you are graphing. Sketch your graphs on the axes that follow, or print your graphs and affix them over the axes. Note: You should observe carefully whether the current flowing through both sensors is essentially the same or if there is a significant difference (more than a few percent). Question 1-16: How can you determine if an observed difference in the currents read by sensor 1 and sensor 2 is real or if it is the result of small calibration differences and normal fluctuations in the sensor readings? Question 1-17: Did you observe a significant difference in the currents flowing at these two locations in the circuit, or was the current the same? Lab 04 – Batteries and Current
5. Try any other tests you need to decide which current model among the choices in Figure 4-6, or any others you come up with, seems most reasonable. Sketch circuit diagrams for the arrangements you used, showing where the sensors were connected. Print all graphs, label them, and affix them below. Question 1-18: Based on your observations, which model seems to correctly describe the behavior of the current in the circuit in Figure 4-5. Explain carefully based on your observations. INVESTIGATION 2: CURRENT AND POTENTIAL DIFFERENCE Now that you have been wiring circuits and drawing diagrams of them you may be getting tired of drawing pictures of the batteries, bulbs, and switches. There are a series of symbols that have been created to represent circuits. A few electric circuit symbols are shown in Figure 4-9. Figure 4-9: Some common circuit symbols. Using these symbols, the circuit from Figure 4-5 with a switch, bulb, wires, and battery can be sketched as on the right in Figure 4-10. Lab 04 – Batteries and Current
Page 1 and 2: Name_______________________________
Page 3 and 4: Name_________________________ Date_
Page 5 and 6: The purpose of the first activity i
Page 7 and 8: Question 1-5: Do the charges genera
Page 9 and 10: Question 1-11: What types of materi
Page 11 and 12: You are now ready to explore models
Page 13: Look at Figure 4-8b and convince yo
Page 17 and 18: Activity 2-2: Inventing and Constru
Page 19 and 20: Figure 4-12: Two voltage sensors co
Page 21 and 22: 9. Now connect a voltage and a curr
Page 23 and 24: Question 2-7: When you added the se
Page 25 and 26: Question E3-4: How does this model
Page 27: 3. Name the circuit element represe

pre-lab preparation sheet for lab 4—batteries, bulbs, and current

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