# Using these data explain why bulbs 2 and 3 are

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Using these data, explain why bulbs #2 and #3 are brighter at Vs = 10 V than at Vs = 5 V. a. Since there’s more current being pushed through I2 and I3, they are brighter at 10V. 2. Using above data and the measured data of current in Table 5, explain: a. Why bulbs #1 and #4 are brighter than bulbs #2 and #3 at both Vs = 5V and 10 v when all the 4 bulbs are in circuit; Source Voltage Cases Measured Current (mA) Observed Bulb’s Brightness Light bulb #1 Light bulb #2 Light bulb #3 Light bulb #4 Vs = 5V All 4 light bulbs are in circuit 132.1 4 1 1 4 Vs = 10V All 4 light bulbs are in circuit 194.4 4 1 1 4 Light bulb #1 is removed 0 0 0 0 0 Light bulb #2 is removed 166.2 3 3 3 3 Light bulb #3 is removed 167.2 3 3 3 3 Light bulb #3 is removed 0 0 0 0 0
i. #2 and #2 have to share the current flowing through the series connection, wile #2 and #4 are able to use the full current coming through the circuit. b. Why bulbs #3 becomes brighter after bulb #2 is removed (all other bulbs are remained in the circuit). i. Since bulb #2 is removed, bulb #3 is able to use all of the current in the series connection. 3. Can the lights at your home be connected as shown in Fig. 4? Why? a. Yes, they can. However, feasibility of the design being implemented into residential settings would depend on bulb/fixture specifications. CALCULATIONS: (Attached) CONCLUSIONS: This experiment further illustrated the nature of electricity and its relations to Ohm’s law. After seeing the characteristics of the light bulbs acting as resistors in the circuit, I was able to visualize how the light bulbs in series acted very differently than the light bulbs in parallel. Because we were treating the light bulbs as resistors, the various levels of brightness allowed me to see how the series connections would reduce the current used, while the connections in parallel would increase since there were more paths for current. It was also very interesting observing the effects of complex circuits where both the series and parallel connections were pulling simultaneously on the current. REFERENCES: Chen, De Haui. General Physics II Lab Manual . Dubuque, IA: Kendall Hunt, 2015. Print. Young & Freedman. 2012. Sears and Zemansky’s University Physics with Modern Physics 13th Edition. Pearson Education. San Francisco