Superposition Problem

Discussion in 'Homework Help' started by markmc001, Oct 2, 2008.

1. markmc001 Thread Starter Member

Mar 10, 2008
12
0
Hi all,
I a have just started a new course and am already feeling like I'm out of my depth with the level of work in some classes! I am struggling with a superposition theorem problem. Could anyone help the the following problem?

Calculate the value of the current in branch PQ using Superposition

I have attached a schematic of the circuit.

MM

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2. The Electrician AAC Fanatic!

Oct 9, 2007
2,282
326
Read the sticky at the top of the first page of the forum.

You should show the work you've done so far in your attempt to solve the problem.

3. markmc001 Thread Starter Member

Mar 10, 2008
12
0
I don't necessarily want the answer but would appreciate it if someone could walk me through the steps of how to approach the question.

4. hobbyist Distinguished Member

Aug 10, 2008
764
56
If I remember correctly, superposition means to calculate what each individual source contributes to the entire circuit. By disabling every source but one, then calculate the effect it has on the circuit, then continue disabling sources and enabling each source one at a time calculating each individual contribution to the circuit. Than algebraicly add the total effect (calculated) of the sources together.

But first you need to convert your component values to reactances. C=Xc L=XL
then take it from there.

5. ee_govcont New Member

Oct 3, 2008
1
0
Disabling the sources means to short the unused voltage supplies and open unused current supplies.

The reactances for L and C are jwL and 1/jwC.

6. scubasteve_911 Senior Member

Dec 27, 2007
1,202
1
As your instructor what the initial conditions are, otherwise you can only get a steady-state solution. If you are truely to find current as a function of t, then you need the initial conditions.

Can you use laplace circuit analysis?

Steve