A) 200 W
B) 2500 W
C) 250 W
D) 2000 W
Correct Answer: D
Solution :
When a single heater (resistance \[{{R}_{1}}=R\]) is connected to 220 V, then it will consume a power \[{{P}_{1}}=1000\,W,\] if two such identical heaters are connected in parallel (total resistance \[{{R}_{2}}={{R}_{1}}/2=R/2\]) to same source, then it will consume power \[{{P}_{2}}\] \[\frac{{{P}_{2}}}{{{P}_{1}}}=\frac{{{R}_{1}}}{{{R}_{2}}}\] \[{{P}_{2}}=2{{P}_{1}}=2000\,\,W\]
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