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# Description of Resistors

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Hi. Can someone please walk me through how to do the following problem?

Two resistors are connected in series to a battery with an emf of 12 V. The voltage across the first resistor is 2.2 V and the current through the second resistor is 0.15 A. Find the resistance of the two resistors.

Thank you.

##### Solution Summary

This solution is provided in an attached .doc file. It provides a diagram of the circuit to enhance learning and uses calculations to solve for resistance over both resistors.

##### Solution Preview

Hi. Can someone please walk me through how to do the following problem?

"Two resistors are connected in series to a battery ...

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###### Education
• BSc , Wuhan Univ. China
• MA, Shandong Univ.
###### Recent Feedback
• "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."
• "excellent work"
• "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!"
• "Thank you"
• "Thank you very much for your valuable time and assistance!"

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