Electric Circuits
Super mesh analysis is used in case of

 both.
 either 1 or 2.
 ideal voltage source is connected between two non reference nodes.
 current source branch is common for two meshes.

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Electric Circuits
Two electric bulbs have transparent filament of same thickness. It one of them gives 60 W and other gives 100 W, then-

 60 W lamp filament has shorter length.
 60 W and 100 W lamp filament have equal length.
 100 W lamp filament has longer length.
 60 W lamp filament has longer length.

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