Electric Circuits
Two identical resistors are first connected in parallel then in series. The ratio of resultant resistance of the first combination to the second will be

 0.25.
 2.
 0.5.
 4.

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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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