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Questions for The Electric House

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In each of the following questions, assume that the light bulbs have the same resistance. In each of your responses, describe what percentage of the current each light bulb originally carries. In each of your responses, describe how the described action will affect the intensities of the remaining lit light bulbs. All answers must be in complete sentences.
  1. You have three light bulbs. All have the same intensity when lit. Explain how you can determine that they are connected in series by unscrewing one light bulb. Support your answer.


  2. You have three light bulbs. All have the same intensity when lit. Explain how you can determine that they are connected in parallel by unscrewing one light bulb. Support your answer. In your response, state the relationship between the current and resistors in parallel.


  3. You have three light bulbs. Two are connected in parallel. This parallel combination is connected in series with the third light bulb. Describe the relative intensity of each bulb. Support your answer.


  4. In question number three, describe the relative intensities of the two remaining lit bulbs if one of the bulbs in parallel was unscrewed. Support your answer.


  5. You have four light bulbs, light bulbs one, two, three, and four. All have the same intensity. Bulb one is unscrewed causing only bulb one to go out. Now, bulb two's intensity is 30% greater than it was originally. Bulbs three and four each have 2/3 of their original intensity. Based upon this information, how are the four bulbs wired? Support your answer.