Electric Circuits
Which of the following characteristics is/are attributed to an ideal independent voltage source?

 Independent of the direction of flow of current.
 both ‘b’ and ‘d’.
 Independent of the magnitude of voltage supplied.
 Independent of magnitude of current supplied..

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

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