Finding Current and Voltage In A Schematic

"It has been a long time since I worked a problem of this sort so I could have made an error."

I did it the long way, just for the exercise, and got 172 mV as well so either we've somehow made different mistakes and gotten the same wrong answer or you've got it right.

He must be desperate. Seems to have posted in many fora.

http://www.crazyengineers.com/forum/electrical-electronics-engineering/48331-find-current-voltage-using-schematic.html#post187600

Homework due on Monday.

This is just to explain which resistances are to be taken in series and which in parallel. Those resistances which are connected together only at one end and carry same current (not equal current) should be taken in series and the resistances which are connected together at their both the ends (they will have same voltage across their two ends) should be taken in parallel. Hope this clarifies your doubt.

Regards.

I am not quite sure whatthe question or should I say answer should be.

Basicaly If you have a resistor in the track that effects current.

If you have a resistor from the track V+ to ground V- then that effects voltage.

If you have a row of resistors the current or voltage will be reduced between each resistor untill you com to the final load which gives the resultant total.

Standard ohms law covers it all but the actual result will depend on the the actual value of the resistors and should be measured if accuracy of current or voltage is required,eg I am repairing a servo design that has been causing problems and we found that the comparator was sending 2 slightly differant voltage signals (ANALOGE) and the manufacturer used 10% tollerance resistors when they should have used 1%

once the resistors were changed to equal values no more problems.

HOPE THIS HELPS

Rachael