Electric Circuits
A certain network consists of large number of ideal linear resistances, one of which is designated as R and two constant ideal source. The power consumed by R is P1 when only the first source is active and P2 when only second source is active. In both sources are active simultaneously then the power consumed by R is

 P1 ± P2 .
 (√P1 ± √P2)2.
 (P1 ± P2 )2.
 √P1 ± √P2.

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Electric Circuits
When we use super node technique

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

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