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Thread moved from the technical forums, so no Homework Template is shown

Hi

I have the following situation:

(Please see attached pic)

I want to know if equation (4) i have written is correct.

What is confusing me is that, I remember being told in circuit analysis that each energy storage element should have its own state variable.

But in this situation when I apply KCL at node 1 and using that relationship I am seemingly able to write iL in terms of the other two variables.

I can apply KCL there cant I?

and if I can apply KCL at that node then I can get il = ig + is?

then I can substitute this result in eq1 to get eq4?

But this seems to violate what I have learnt in class of each energy storage element needing its own state variable.

Any help is much appreciated.

Thank you

I have the following situation:

(Please see attached pic)

I want to know if equation (4) i have written is correct.

What is confusing me is that, I remember being told in circuit analysis that each energy storage element should have its own state variable.

But in this situation when I apply KCL at node 1 and using that relationship I am seemingly able to write iL in terms of the other two variables.

I can apply KCL there cant I?

and if I can apply KCL at that node then I can get il = ig + is?

then I can substitute this result in eq1 to get eq4?

But this seems to violate what I have learnt in class of each energy storage element needing its own state variable.

Any help is much appreciated.

Thank you

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