find the value of current at X and its direction.
Diagram is in attachment..help guys..

Question

find the value of current at X and its direction.
Diagram is in attachment..help guys..

anonymous · Answer

attachment

anonymous · Answer

The internet is a beautiful thing!! http://hyperphysics.phy-astr.gsu.edu/hbase/hframe.html

anonymous · Answer

innit :)

anonymous · Answer

hey cristie can you solve it for me ??

anonymous · Answer

@deep eyes, this site is to gain knowledge. all will give ideas. we should solve by our own. then only we can improve.

anonymous · Answer

itried thousand tymes but still can't get it !!

anonymous · Answer

if moderator was here ..he could 've solved it !!

anonymous · Answer

http://hyperphysics.phy-astr.gsu.edu/hbase/hframe.html see this link

anonymous · Answer

try by this one

stormfire1 · Answer

You have to use Kirchoff's Voltage and current laws to develop 3 equations.  First draw in some current directions...what you choose for directions doesn't really matter as long as you stick with them throughout the problem.

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Now go through each loop to make the equations.  Using Kirchoff's voltage law you get these two equations:
4V=20*I2 + 20 * I1
10V = 20*I2 + 80*I3

Using Kirchoff's current law you get this node equation:
I1 + I3 = I2

Now you have 3 equations with 3 unknowns.  You can either solve them by hand or use your calculator to solve the matrix.  The answers will be:

I1 = 60 mA
I2 = 140 mA
I3 = 90 mA

I2 is the middle current and since it's positive, the direction we chose to solve the problem was correct.  If it were negative, the direction would have to be reversed.