Basic Laws: Wye-Delta Transformation II

CET acquaintance is coming! So we decided to make this blog a day earlier because we might be too tired to do stuffs after the event. Anyways. Greetings again our dear professor! We got a problem upon discussing what to write on this blog for because the topic that we discussed last week, is of the same topic we have discussed this week. But as we specified on our last blog, the wye-delta transformation that we have explained is only a kind of introduction. So now we decided to make wye-delta transformation a little broader.

PROPER USAGE OF WYE-DELTA TRANSFORMATION

How to apply this wye-delta transformation? Lets have this example.

 As said, we use wye-delta transformation if the resistors are neither connected in series or parallel. Thus getting the equivalent resistance may seem impossible if wye-delta transformation is not applied. On the given example, we first determine what is the best and easiest transformation in order to acquire the equivalent resistance. On this case, delta to wye transformation is the likely candidate, because in only one transformation we can solve directly the equivalent resistance. Also there are no wye (Y) circuit formation found on the circuit.  Never realized that one until few seconds ago.  Anyways applying these equation to R1, R2 and R3 we can arrive at a redrawn but equivalent circuit.

Thus the redrawn circuit will look like.

Our deepest apologies for a badly made redrawn circuit.  Now we can actually solve for the equivalent resistance which is simply. 

However, this equation is only applicable to our redrawn circuit.

Learning:

This week (although we had similar topic of the previous week) we have learned that doing wye-delta is not complicated as it first seems. The only weight is to analyze the circuit and understand what transformation should be used for us to acquire and be able to have the equivalent resistance of the circuit.

"Having to deal with technology can be painfully harsh, but every pain has its own hidden worth"