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Homework Statement
Homework Equations
Rparellel=1/R1+1/R2...
IR1=R2/R1+R2 x I
The Attempt at a Solution
I am unsure of how to answer d) and e) using KVL because I count 4 junctions?
Where should I start?
No. $${1\over 12} + {1\over 10}+ {1\over 16}+ {1\over 20}+ {1\over 25} = {1\over 2.98}$$However,$$DevonZA said:(1/12+1/10+1/16+1/20+1/25)^-1=15.18 ohms
What sort of device is R7 that its resistance changes depending on whether the switch is opened or closedDevonZA said:Homework Statement
[ ATTACH=full]99511[/ATTACH]
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Can you show this?CWatters said:+1
Although I prefer to make the voltages around the loop sum to zero.
CWatters said:Although I prefer to make the voltages around the loop sum to zero.
DevonZA said:Can you show this?
Thank you for the nice clear explanation CWattersCWatters said:With reference to the equivalent circuit below... KVL says that going around a loop the voltages sum to zero.
View attachment 99596
If I arbitrarily choose to start at the -ve terminal of the battery and go around clockwise we have to prove that..
+120 + (-V1) + (-V2) + (-V3) + (-V4) = 0
V1 = 1.2 * 4.07 = 4.884V
V2 = 1.2 * 60 = 72V
V3 = 1.2 * 11.11 = 13.332V
V4 = 1.2 * 24.82 = 29.784V
Substitute..
+120 - 4.884 - 72 -13.332 - 29.784 = 0