Electric Circuits
Two wires of A and B of the same material and length ‘l’ and ‘2l’ have radius ‘r’ and ‘2r’ respectively. The ratio of their specific resistance will be

 1:8.
 4:1.
 1:2.
 1:1.

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

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