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Homework Statement
http://img125.imageshack.us/img125/5434/asdfjr7.jpg
The Attempt at a Solution
Basically for this excercise I have to fill in the gaps with "increases", "decreases" or "stays the same".
Some of the parts I can do, others I am clueless in. It would be helpful if somebody could explain it to me in a very simple manner
a) If R7 increases, potential difference between points A and E increases. Assume no resistance in [PLAIN]http://img82.imageshack.us/img82/4954/26005668vm6.jpg and έ (the battery)
b) The same as in a) but with resistance between [PLAIN]http://img82.imageshack.us/img82/4954/26005668vm6.jpg and έ (the battery)
[I'm unsure what the answer is]
c) If R7 increases, voltage drop across R4 decreases
d) If R2 decreases, current through R1 _________ [unsure of answer]
There's a couple more, but I'll leave it at that for the time being so it's easier to "digest".
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