Fundamentals of Circuits I: Current Models, Batteries & Bulbs

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Fundamentals of Circuits I: Current Models, Batteries & Bulbs v 0.1 Prediction 3.2 Now suppose you connect a second bulb in the circuit, as in Fig. 12. How do you think the potential difference across the battery will compare to the potential difference with only one light bulb Will it change significantly + VP1 − − + CP Figure 13: Circuit with two light bulbs Step 5: Connect the circuit as in Fig. 13. Step 6: Again collect data to make graphs of Potential difference and current. Sketch your graphs, using dotted lines to show your results with two bulbs. Represent the magnitudes of the current and potential as accurately as you can. Question 3.4 Was the current through the circuit significantly different with two bulbs than it was with one bulb (more than a few per cent) Question 3.5 Was the potential difference significantly different with two bulbs than it was with one bulb (more than a few per cent) Question 3.6 Does the battery appear to be a source of constant current, constant potential difference, or neither when additional elements are placed in the circuit PHYS-204: Physics II Laboratory 17
Fundamentals of Circuits I: Current Models, Batteries & Bulbs v 0.1 These laboratory exercise has been adapted from the references below. References [1] David R. Sokoloff, Priscilla W. Laws, Ronald K. Thornton, and et.al. Real Time Physics, Active Learning Laboratories, Module 3: Electric Circuits. John Wiley & Sons, Inc., New York, NY, 1st edition, 2004. [2] Priscilla W. Laws. Workshop Physics Activity Guide, Module 4: Electricity and Magnetism. John Wiley & Sons, Inc., New York, NY, 1st edition, 2004. [3] Lilian C. McDermott, et.al. Physics by Inquiry, Volumes I & II. John Wiley & Sons, Inc., New York, NY, 1st edition, 1996. PHYS-204: Physics II Laboratory 18
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Fundamentals of Circuits I: Current Models, Batteries & Bulbs

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