# Mesh analysis

1. Feb 24, 2010

### tnecniv

How do i use mesh analysis to find the current of RL?
can someone teach me how i should indicate the loops and +/- on the circuit?

Last edited by a moderator: May 4, 2017
2. Feb 24, 2010

### Staff: Mentor

Please show us your attempt at a solution. We do not do your homework for you here.

You can also search at wikipedia.org for basic tutorial info on mesh analysis.

Last edited by a moderator: May 4, 2017
3. Feb 24, 2010

you can choose any sense of the loops(clockwise,anticlockwise,or both).it doesnt affect the final result..but for each sense of the loop in a mesh,u have to form the kirchoff's equation according to the loop's sense you put......
u finally get a system of equations with several unkowns.......
take this easy operation:
suppose u have three meshes:
put all the current loops in a clockwise direction (I1,I2,I3 respectively)
consider the 3 matrices (v),(z)and(I)
and (v)=(z)(I) , (I)=(I1,I2,I3) , (v)=(sum of "voltage sources" according to sense of current in the first mesh, similarly for the 2nd mesh,similarly for the 3rd mesh)

for (z): z11: sum of empidences of mesh 1
z22:sum of empidences of mesh 2
z33:sum of empidences of mesh 3
z12:minus (sum of commom empidences between meshes 1 and 2)
z13:minus(sum of commom empidences between meshes 1 and 3)
z23:minus(sum of common empidences between meshes 2 and 3)

z12=z21, z31=z13, z23=z32;
so u abtain the system and u get I1,I2,I3...

and so, u can perform this operation for any number of meshes (sense of loops are clockwise!! here)
thank you