Electric Circuits
Twelve 6 Ω resistor used as edge to form a cube. The resistance between two diagonally opposite corner of the cube is

 6 Ω.
 6 / 5 Ω.
 5 / 6 Ω.
 5 Ω.

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Electric Circuits
When we use super node technique

 ideal voltage source is connected between two non reference nodes.
 current source branch is common for two meshes.
All of these
 ideal voltage source is connected between non reference node and reference.

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