1. The problem statement, all variables and given/known data 9.15 a) Each box has the restistance 1 Ohm. Find the total resistance between 1) A-B 2) A-D 3) B-C b) Find I (electric current(?)) from A-D if you put a battery from B-C c) Find I on the Ammeter and the direction (the lower picture) http://sphotos-h.ak.fbcdn.net/hphotos-ak-prn1/v/954585_10151577257929660_1441841441_n.jpg?oh=536e2a504401f9beebed972302e56839&oe=51920295&__gda__=1368521085_3193921ab59c05a6069ec6b2519d2702 9.126 a) Use Kircchofs 2nd law on ABED to show that I3 ) 0,5A b) Explain how I2 + I5 = 2A. Use Kirchhoffs 2nd law on BEFC to find another equation for uknown I2+I5 c) Find I1 and I4 d) Find the resistance R. 2. Relevant equations Kirchoff's circuit law is relevant 3. The attempt at a solution 9.15 a) 1) Thought it would be just 1 ohm but it's supposed to be 0,63 2) I used 1/Rtotal = 1/R + 1/R + R which means 2+1 = 3 which is wrong while it's supposed to be 0,5. This makes the rest pretty complicated to solve. 9.126 I used Kirchoffs law and found following formulas but not sure if it's supposed to be solved as 5 unknowns while we've only been into 3.