# Need to find two currents in this circuit

1. Feb 2, 2008

### opticaltempest

I am trying to find the currents I_D1 and I_D2 labeled in the picture by the arrows. I am stumped on how to obtain the correct values for the currents. I am having trouble using either KCL or KVL. This circuit seems simple but has me stumped.

If I write KCL at the node to the right of the I_D1 arrow I get

$$-I_{D1}+I_{D2}-I_{6V}=0 \implies$$

$$I_{D1}=I_{D2}-I_{6V}.$$

$$I_{6V}=\frac{6V}{43k\Omega}=140\mu A$$

$$I_{D2}=\frac{9V}{22k\Omega}=409\mu A$$

Is there an easier or different way to do this problem, perhaps using KVL instead of writing a KCL equation at the node I used?

Thanks

Last edited: Feb 2, 2008
2. Feb 2, 2008

### Defennder

Yes you can also do it via mesh analysis. You would have 2 equations here.

3. Feb 3, 2008

### CEL

The simplest way to solve the circuit is the one you used.

4. Feb 5, 2008

### Andrew123

Quick solution:

Hey this is a simple mesh anaylisis problem.. I've included a solution. I hope it helps. Cheers

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