Measuring DC Series/Parallel Circuit?

[Deathshead]

How do I figure out Vt when all I am given is Rt??


THnx In Advance

 

[chaotic-mind]

You can't. You need at least two values to calculate the total voltage in a circuit. You need Rt and It, Rt and Pt, or It and Pt.

 

[Deathshead]

besides the Rt i also have a v=20v going into the 3rd resistor

 

[Russlk]

How about posting the whole problem, so we can understand?

 

[chaotic-mind]

deathshead please post the entire problem as russlk said. if you have other voltages then you clearly have more than just Vt.

 

[ChrisP]

I'll betcha he's got the value of that 3rd resistor, and that it's the series portion of the circuit, which would then allow calculation fo the circuit current, and then continue on from there...

 

[chaotic-mind]

That would be too easy though. :wink:

 

[ChrisP]

Yeh -- that would be easy -- but it's the kind of thing I would give my students all the time... and a surprising number of them would miss it!

 

[chaotic-mind]

I meant too easy for us. We'll probably have to provide more of an explanation than that. That is a good one to see who's paying attention though. 8)