1.

If \[{{R}_{1}}\] and \[{{R}_{2}}\] are respectively the filament resistances of a 200 watt bulb and 100 watt bulb designed to operate on the same voltage, then [NCERT 1980; CPMT 1991, 97]

A.            \[{{R}_{1}}\] is two times \[{{R}_{2}}\]                         
B.            \[{{R}_{2}}\] is two times \[{{R}_{1}}\]
C.            \[{{R}_{2}}\] is four times \[{{R}_{1}}\]                         
D.            \[{{R}_{1}}\] is four times \[{{R}_{2}}\]
Answer» C.            \[{{R}_{2}}\] is four times \[{{R}_{1}}\]                         


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