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E1_1-26-10 - notebook showing as many different parts of it...

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Electricity In this section of the course, we are going to use experimentation to figure out some of the physics of electricity. We are going to study electrical “current” and figure out rules that predict when it will “flow” and how large it will be. We will try to make simple models that will relate what we to see to other “flows” in our day-to-day lives. E1: Batteries and Bulbs Materials: A battery, a bulb, and a piece of wire Initial definitions and givens: Current: the number of electrons that flow past a point each second The brightness of a light bulb is directly proportional to the current flowing through it. Initial Instructions and questions: 1. Examine the light bulb carefully. Draw a large picture of it in your
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Unformatted text preview: notebook showing as many different parts of it as you can; e.g. if something changes from silver to black, don’t show them as one part. Choose one member of your group to draw a large bulb on a Whiteboard. The class will compare pictures. 2. Predict how you think the battery, bulb, and wire should be connected in order to make the bulb light. Make a sketch of your prediction in your notebook. 3. Try it and make changes until it works. Record each try in your notebook. Draw your success 4. Try to answer the question “Under what conditions does electrical current flow”. Discuss with your group and put your answer on the Whiteboard. The class will discuss your suggestion. 5. Think of other experiments to test your rule....
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