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JadeEyes
 3 years ago
Write down the nodal equation in a matrix form and determine the current flowing through branch AC.
JadeEyes
 3 years ago
Write down the nodal equation in a matrix form and determine the current flowing through branch AC.

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JadeEyes
 3 years ago
Best ResponseYou've already chosen the best response.0The answer is 2.6A. I've worked it out first by using KCL and Ohm's law at the Nodes. At that point I've considered current direction. Then, using Cramer's rule I got 12A. If we don't take into consideration current direction, i.e take it all to be positive, you obtain the answer 2.61A.

JadeEyes
 3 years ago
Best ResponseYou've already chosen the best response.0However, i don't understand why we don't take the current directions in this case while using KCL. Can anyone explain me the reason why.

JadeEyes
 3 years ago
Best ResponseYou've already chosen the best response.0KCL  Kirchoff's current law

RaphaelFilgueiras
 3 years ago
Best ResponseYou've already chosen the best response.1you dont take signal if current is entering in node or leaving it?

JadeEyes
 3 years ago
Best ResponseYou've already chosen the best response.0Yes. We don't consider whether it is leaving or entering the node, then we get the answer.

RaphaelFilgueiras
 3 years ago
Best ResponseYou've already chosen the best response.1if you dont using the signal then you will find in your ans a negative current

RaphaelFilgueiras
 3 years ago
Best ResponseYou've already chosen the best response.1dw:1348233456678:dw

RaphaelFilgueiras
 3 years ago
Best ResponseYou've already chosen the best response.1if you do all you currents like this all will be positive,but when you do the equations some value will be negative get it?

JadeEyes
 3 years ago
Best ResponseYou've already chosen the best response.0So that's why we take it that all the current is moving away from the node..??

RaphaelFilgueiras
 3 years ago
Best ResponseYou've already chosen the best response.1yes, you dont have to know first, the direction of current ,if you find a negative value the current is entering in node instead leaving

JadeEyes
 3 years ago
Best ResponseYou've already chosen the best response.0Okay..!! Thanks for your help..!! Fan + medal..!! :)

RaphaelFilgueiras
 3 years ago
Best ResponseYou've already chosen the best response.1you are welcome
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