# 2 section 4 do you expect them to be the same in both

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2. (Section 4) Do you expect them to be the same in both cases? Assume the two bulbs are of the same resistance and consider what will be their equivalent resistance in each case. How might this affect the current coming from the battery? Record and explain what you observe. Which configuration produces the most total light and why? Since both light bulbs are the same, we predicted that the brightness of the two bulbs in each circuit will be the same. Assuming the light bulbs are of the same resistance, 2 ohm, the equivalent resistance in each case will be: Series: R eq = 2 + 2 4 Ω Parallel: From our observation of the two circuits, the light bulbs in the parallel circuit are brighter than the light bulbs connected in series. The configuration where the two light bulbs and the two batteries are all connected in parallel produces the most total light and this can be seen by looking at ohm’s law. I = V/R

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Series: I = (2.266 V) / 4 Ω 0.567 ± 0.001 A Parallel: I = (1.133 V) / 1Ω 1.133 ± 0.001 A 3. (Section 4) How do you predict the brightness of the bulbs will change if you connected a wire from one end of the bulb C to the other? Now do so using one of the pieces of wire provided. Where your predictions correct? Explain the observed behavior using Ohm’s Law and what you know about the series and parallel configurations. We predicted that the brightness of bulb A would not be affected however, the brightness of bulb B and C would be affected because the current running through the circuit would have to be split into three paths once a wire is connected from one end of the bulb C to the other. Because the current would now need to be split into three, the brightness of the bulbs would further decrease in comparison to before. And in during our observation, we saw that the brightness did change a bit compared to the brightness of the light bulbs before. 4. (Section 6) Draw out the equivalent circuit based on the measurements you’ve made. Now considering what components are known to be in each box, determine and draw the circuit arranged containing these components.
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