Kirchhoff's Current Law Question

[zack7]

Homework Statement

I can't seem to solve the question. I know one of the equations is

I_T=+IR₁+IR₂+IR₃

but for the other three loops I get the same equation just that the IR is different

Anyone has a idea on how to solve?

[PLAIN]http://img714.imageshack.us/img714/6356/doentoi.jpg
Thank you

 

[gneill]

In what fashion are the three resistors connected (series or parallel)? What do you know about the relationship between voltage or current for components connected in such fashion?

 

[zack7]

In what fashion are the three resistors connected (series or parallel)? What do you know about the relationship between voltage or current for components connected in such fashion?

the resistors are in parallel and thus the effective resistance is the reciprocal of the total of all three resistors

i got 2.4mA for the total current which looks incorrect

 

[gneill]

the resistors are in parallel and thus the effective resistance is the reciprocal of the total of all three resistors

i got 2.4mA for the total current which looks incorrect

Looks fine to me!

 

[zack7]

Looks fine to me!

but then what about the 10 ampere currents

 

[gneill]

but then what about the 10 ampere currents

Those boxes would seem to be representations of current meters (ammeters) inserted to measure the current in the various circuit branches. I take it that the "10A" indications inside each of them are not the actual current values (else why would you be asked to calculate them?). Could be that they represent a "range setting" for the meters.

Where does the diagram come from? If it's a book, it should somewhere describe the conventions used for its circuit diagrams and notations.