These are the 4 questions.. im trying electricity and i just cant figure these out..
http://img846.imageshack.us/g/screenshot001d.jpg

the questions are in the picture.. they arent homework questions just practice questions and there no examples in the text book for these exact types of circuits please help!! thanks in advance

 

going to post my attempt in a sec

 

http://img405.imageshack.us/g/img2011032000002.jpg/

i only attempted the easiest looking one because all the otherr ones i do not understand at all..

 

Welcome to AAC!

Part of the problem is you are trying to do it all in one step. This isn't practical.

Basically keep simplifying and redrawing. As you redraw a simpler circuit it gets easier to solve. Two resistors in series become one, same if two resistors are in parallel.

For Delta Y configurations (which are tricky) this chapter in the book...

http://www.allaboutcircuits.com/vol_1/chpt_10/13.html

will demonstrate how to deal with them.

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