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CBSE Class 10 Answered

Two lamps, one rated 100 W at 220 V and the other 200W at 220 V are connected (i) in series and (ii) in parallel ot electric main supply of 220V. Find the current drawn in each case. In this question  I'm able to find the answer for parallel connection in another way but able to do so for series if I follow the same methodology  We know, the potential difference across each of the lamps is same so, 1/R1 + 1/R2 = 1/Rp Multiplying V^2 on both sides of the equation, I get V^2/R1 + V^2/R2 = V^2/Rp Which is technically saying, P1 + P2 = Pp  Doing so, I get Pp = 300W and current drawn by the lamps is Pp = VI 300 = 220*I I = 15/11 = 1.36 A im not able to find an analogy like this for series pls help                  
Asked by veemadhu | 03 Mar, 2020, 10:21: PM
Expert Answer
Hello student,
 
Click on the link given below for the answer:- 

Total current in series and parallel
 
All the best!!!
Answered by Shiwani Sawant | 03 Mar, 2020, 11:00: PM

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