Electric Circuits
The capacitance of a parallel plate capacitor can be varied by

All of these
 changing the distance between the plates only.
 changing the overlapping area of the plates only.
 changing the dielectric medium only.

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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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