- #1
Drizzy
- 210
- 1
Homework Statement
What is the potential in the batteries "negative part"?
http://imgur.com/7nuxgC3
Homework Equations
3. The Attempt at a Solution [/B]
I don't know how to think...
My total resistance is:
[(1/50) + (1/75)]^-1 + 10 = 40 ohm
I=V/R = 36/40 = 0.9
The voltage on the 10ohm resistance is 0.9 *10 = 9V
Now I know that the voltage on the parallell resistances is 36-9 = 27v
Now I have to go from ground :
0 - 27 - 9 = -36
But this is wrong... I don't understand why