1.

Two bulbs of 500 watt and 200 watt are manufactured to operate on 220 volt line. The ratio of heat produced in 500 W and 200 W, in two cases, when firstly they are joined in parallel and secondly in series, will be [MP PET 1996; DPMT 1999]

A.            \[\frac{5}{2},\,\frac{2}{5}\]    
B.            \[\frac{5}{2},\,\frac{5}{2}\]
C.            \[\frac{2}{5},\,\frac{5}{2}\]    
D.            \[\frac{2}{5},\,\frac{2}{5}\]
Answer» B.            \[\frac{5}{2},\,\frac{5}{2}\]


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