Electric Circuits
When we use super node technique

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

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Electric Circuits
Pure metal generally have

  low conductivity and high temperature coefficient.
  low conductivity and zero temperature coefficient.
  high conductivity and large temperature coefficient.
  high conductivity and low temperature coefficient.

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