Calculating Short Circuit Current with Node Equations

[princejan7]

Homework Statement

http://postimg.org/image/b8p4rszot/

There is a short circuit between the terminals a-b

Homework Equations

The Attempt at a Solution

so I found the node voltages at 1 and 2, but I don't know how to use these to get the short circuit current...

 

[berkeman]

Homework Statement

http://postimg.org/image/b8p4rszot/

There is a short circuit between the terminals a-b

Homework Equations

The Attempt at a Solution

so I found the node voltages at 1 and 2, but I don't know how to use these to get the short circuit current...

If the short circuit current is just the current that flows in the a-b wire when terminals a and b are shorted, it would look to inolve the 3A current source and the current through the 16 Ohm resistor...

 

[princejan7]

If the short circuit current is just the current that flows in the a-b wire when terminals a and b are shorted, it would look to inolve the 3A current source and the current through the 16 Ohm resistor...

whats the current through the 16ohm resistor that enters terminal a? is it 3A?

 

[berkeman]

whats the current through the 16ohm resistor that enters terminal a? is it 3A?

Beats me. Show us your KCL equations and your solution of them. We can check your work.

 

[princejan7]

Beats me. Show us your KCL equations and your solution of them. We can check your work.

http://postimg.org/image/4b0617wj1/

I tried writing KCL equation's at the nodes marked to solve for the short circuit current but they're incomplete since I don't know how to express the current through the 16 ohm resistor entering/exiting those nodes

 

[berkeman]

http://postimg.org/image/4b0617wj1/

I tried writing KCL equation's at the nodes marked to solve for the short circuit current but they're incomplete since I don't know how to express the current through the 16 ohm resistor entering/exiting those nodes

I = V2 / 16 Ohms

 

[princejan7]

I = V2 / 16 Ohms

ok thanks

also, does the short circuit current through a-b include anything of the 3A current source?

 

[NascentOxygen]

also, does the short circuit current through a-b include anything of the 3A current source?

Yes, assume it does and proceed to form the node equations accordingly.