עמוד:24

Experiment C – Dynamo-powered light bulb Objective : To observe the change of energy in a device that includes a dynamo * and an electric light bulb . Equipment : A device consisting of a manually operated wheel , a dynamo , and a light bulb . Procedure : Turn the wheel . Result : Describe what happened . Conclusion : Summarize the energy transformations and energy transfers in both words and using an energy diagram . Dynamo - A device that converts kinetic energy into electrical energy . Enrichment Inquiry Activity : Is there a relationship between the velocity of the wheel turning the dynamo and the light intensity of the light bulb ? 1 . Formulate a hypothesis about the correlation between the velocity of the dynamo wheel and the intensity of the light bulb . 2 . Plan an experiment to verify the hypothesis using the equipment at your disposal . 3 . Perform the experiment you planned . 4 . Repeat the experiment several times ( at least two more times ) . Explain the need to repeat the experiment several times . 5 . Formulate a conclusion in light of the results you obtained .

מטח : המרכז לטכנולוגיה חינוכית


לצפייה מיטבית ורציפה בכותר