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1. Draw a circuit involving bulbs and a battery as follows: Bulb A and bulb B are in series. The A/B combination is in parallel with bulb C. The battery is in parallel with bulb C. Rank the bulbs in terms of brightness, from brightest to least bright.

2. Draw a circuit with bulbs and a battery as follows: Bulb A and bulb B are in parallel. Bulb C is in series with the A/B combination. Bulb D is in series with bulb C. The battery is in series with bulb D and with the A/B bulb combination, completing a circuit. Rank the bulbs in terms of brightness, from brightest to least bright.

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This solution includes drawings of circuits involving bulbs and a battery in various combinations of series.

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1. Draw a circuit involving bulbs and a battery as follows: Bulb A and bulb B are in series. The A/B combination is in parallel with bulb C. The battery is in parallel with bulb C. Rank the bulbs in terms of brightness, from brightest to least bright.

Assume that three bulbs have equal resistor R. Then we can know that the current I(C) passing bulb C and the current I(A,B) passing bulb A ...

Solution provided by:
Changping Wang, MA
Education
  • BSc , Wuhan Univ. China
  • MA, Shandong Univ.
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  • "Your solution, looks excellent. I recognize things from previous chapters. I have seen the standard deviation formula you used to get 5.154. I do understand the Central Limit Theorem needs the sample size (n) to be greater than 30, we have 100. I do understand the sample mean(s) of the population will follow a normal distribution, and that CLT states the sample mean of population is the population (mean), we have 143.74. But when and WHY do we use the standard deviation formula where you got 5.154. WHEN & Why use standard deviation of the sample mean. I don't understand, why don't we simply use the "100" I understand that standard deviation is the square root of variance. I do understand that the variance is the square of the differences of each sample data value minus the mean. But somehow, why not use 100, why use standard deviation of sample mean? Please help explain."
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  • "Thank you so much for all of your help!!! I will be posting another assignment. Please let me know (once posted), if the credits I'm offering is enough or you ! Thanks again!"
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