|
1
The symmetry is used: nodes are divided in 3 groups based on the distance to node $A$
|
1.00 |
|
| 2 In blue nodes potential is $(\varphi_A+\varphi_B)/2$ | 1.00 |
|
| 3 According to the symmetry $\varphi_A-\varphi_{red} = \varphi_{blue}-\varphi_B$ | 1.00 |
|
|
4
Equivalent circuits is drawn or $\varphi_{red}$ is calculated
|
0.50 |
|
| 5 \[R_{AB}=\frac{2}{3}R\] | 0.50 |
|