# A circuit analysis problem

1. Oct 8, 2005

### Salman

PROBLEM:the current at the terminals of a certain current source is measured with an ammeter having an internal resistance $$R_i=10 ohms$$ and is found to be $$11.988 mA$$ ;adding a $$1.2 kilo -ohms$$ resistance between the source terminals causes the ammeter reading to drop to $$11.889 mA$$.Find $$i_s$$ and $$R_s$$

NOTE:$$i_s$$ and $$R_s$$ constitute a practical current source.i.e $$R_s$$ is the internalresistance of the source $$i_s$$

2. Jul 6, 2017

### scottdave

For a practical current source, the internal resistance should be shown as a resistor parallel to the "ideal" current source.

3. Jul 6, 2017

### Staff: Mentor

Misplaced homework thread closed for Moderation...

4. Jul 6, 2017

### Staff: Mentor

Oh duh, this is a way old problem that got put in the Open Practice Problems forum. Dave, I don't think the OP is going to read our replies...

5. Jul 7, 2017

### scottdave

Ha, I just realized what the date was on that.