Kirchhoff's Laws worksheet

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tonym1069

Joined Aug 17, 2010
6
Under Education, worksheets, Kirchhoff's laws, Question 25 for Voltage drop FD I get -12V, and Voltage Drop AF I get -24. The answer given is opposite or my answers are reversed. Is this correct?
 

WBahn

Joined Mar 31, 2012
26,398
Under Education, worksheets, Kirchhoff's laws, Question 25 for Voltage drop FD I get -12V, and Voltage Drop AF I get -24. The answer given is opposite or my answers are reversed. Is this correct?
The answers in the work sheet are wrong and you are correct.

The sanity check is that R4 and R5 are in series and thus have the same current flowing in them. Since R4 is twice the resistance of R5, the magnitude of the voltage drop across R4 (|V_AF|) will be twice that across R5 (|V_FD|)
 

JoeJester

Joined Apr 26, 2005
4,390
You are correct. I did all the calculations, but when I looked over the answers, I failed to compare the V xx .... causing my error.
 
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