Im stuck on my electric curcuit homework could u guys help me

 

Hi,
Welcome to AAC.
As this is homework please post your best attempt at answering, we can then help.
E

 

ı just tried and gave up now ım dig in to another question maybe u could give me a hint

 

hi,
OK,
First check out page 2-2 of this PDF, [Fig 2-4 ] look over the equations for that IA configuration.

Post your calculations

Ask if you have a problem.
E

 

oh thanks ım very appreciate

 

hi,
OK, please post your calculations.
E

 

first my writing skills is very bad sorry for that and im just trying to solve another question can i show u for check?
here its and again sorry for ur eye healt now im trying to find c part could u help me :/

 

I took a quick look at your written work but I have to go do something for about an hour and had some trouble reading it. I fixed it up a bit so if someone else has the chance to help it might be easier. I’ll try to take a look when I get back.

 

I took a quick look at your written work but I have to go do something for about an hour and had some trouble reading it. I fixed it up a bit so if someone else has the chance to help it might be easier. I’ll try to take a look when I get back.

View attachment 235812

its better thanks for that

 

its better thanks for that

I don’t want to leave you hanging. The maths are not my strong suit and so I am having a very hard time with your solution. It’s extremely hard for me to follow your notes. There are people here who are much better in this area than I am and I am hoping someone will step up, or Eric when he Is available.

 

I don’t want to leave you hanging. The maths are not my strong suit and so I am having a very hard time with your solution. It’s extremely hard for me to follow your notes. There are people here who are much better in this area than I am and I am hoping someone will step up, or Eric when he Is available.

I think thats not require master math skill just need to know where to use formula thats the problem thanks for ur interest ım very appreciete and when eric is online he probably help lets see

 

just need to know where to use formula thats the problem

One does not need a formula to write node equations; what you need is a procedure. There are several possibilities for expressing the notion that the sum of currents at a node must equal zero, but I will describe the one that is easy (for me) to remember and any errors are easy to find.

First: color-code the nodes and label the node voltages.
Second: write the node equations for each node. The sum of currents at each node equals zero.

Current at a node has the following form: [(Node Voltage) - (Adjacent Node Voltage)]/(Resistance to adjacent node)
Note that each term of the node equation begins with the voltage of that node. For instance, the current through R1 has the form (V2-V1)/R1 in the node equation for V2; but has the form (V1-V2)/R1 in the node equation for V1.
For defined current sources, current leaving the node is considered positive in the node equation.

For a circuit with dependent sources, express the dependency in terms of the node voltages.

By always using the same exact procedure I can generally just look at the color-coded circuit and type the node equations directly into Maple, then let the Maple solver crank the algebra and do the Bode plots, etc.

 

You have some sign errors. The current from the 2A source is entering node 1 and leaving node 2; it can't have the same sign in both equations. Also the sign of the 4A current should be the same as the sign of the 2A current in the equation for node 2 because both currents are leaving node 2.