Question About Electric Circuit

AI Thread Summary
To find the magnitude of I_{ab}, understanding Kirchhoff's Current Law (KCL) is essential. The voltages at points "a" and "b" are the same since they are connected, which can be determined using the potential divider method. After calculating the voltage, the currents through the resistors can be found, allowing for the application of KCL at either point. Alternatively, KCL can be applied directly without prior voltage calculations. Mastering these concepts will help in solving the circuit problem effectively.
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Homework Statement



Please give me a clue, I don't understand, how to find the magnitude of ##I_{ab}##?

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Homework Equations

The Attempt at a Solution

 
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What have you tried so far? Are you familiar with KCL?
 
Have you worked out the voltage on a/b?
 
cnh1995 said:
What have you tried so far? Are you familiar with KCL?

I am stuck. What is KCL? Is it Kirchoff's Current Law?

CWatters said:
Have you worked out the voltage on a/b?

How?
 
askor said:
I am stuck. What is KCL? Is it Kirchoff's Current Law?

Yes.

Have you worked out the voltage on a/b?

How?

"a" and "b" are at the same voltage because they are connected together. To work out that voltage you can simplify the circuit and use the potential divider method. There are other ways.

Once you have that voltage you can calculate the currents through all the resistors. Then apply KCL at either a or b.

or you can just wade in and apply KCL from the outset.
 

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