Electric Circuits
A piece of copper and another piece of germanium are cooled from room temperature to 80K. The resistance of

 copper decreases and germanium increases.
 each of them increases.
 each of them decreases.
 copper increases and germanium decreases.

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Electric Circuits
When we use super node technique

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

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