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16. A 100 W bulb B 1 , and two 60 W bulbs B 2 and B 3 , are connected to a 250 V source, as shown in the figure. Now W 1 , and W 2 and W 3 are output powers of the bulbs B 1 , B 2 and B 3 respectively. Then (A) W 1 >W 2 =W 3 (B) W 1 >W 2 >W 3 (C) W­ 1 2 =W 3 (D) W 1 2 3 Please clear my doubt..when they have said that the power is 100W 60W etc..how does it change in this situation ?..if you are saying they change with applied voltage then for what voltage is the power 100W ?..please explain..and..if I try to find current through the two resistors in the top..then I get extra variables and the problem is becoming complicated as I write i(R1+R2)=250 ..now how should I use the given power to eliminate variables ?..I just dont understand what the power they have given means exactly..and how am I supposed to use it ? Thank you very much ! :)

16.        A 100 W bulb B1, and two 60 W bulbs B2 and B3, are connected to a 250 V source, as shown in the figure. Now W1, and  W2 and W3 are output powers of the bulbs B1, B2 and B3 respectively. Then    

                    power-circuit


(A)       W1>W2 =W3     
(B)       W1>W2 >W3 
(C)       W­12 =W3 
(D)       W123 


 


Please clear my doubt..when they have said that the power is 100W 60W etc..how does it change in this situation ?..if you are saying they change with applied voltage then for what voltage is the power 100W ?..please explain..and..if I try to find current through the two resistors in the top..then I get extra variables and the problem is becoming complicated as I write i(R1+R2)=250 ..now how should I use the given power to eliminate variables ?..I just dont understand what the power they have given means exactly..and how am I supposed to use it ?


 


Thank you very much ! :) 

Grade:12

1 Answers

iit jee
44 Points
13 years ago

HI,

I THINK ITS A)W1>W2=W3...........................

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