Two bulbs 25W, 100V (upper bulb in figure) and 100W, 200V (lower bulb in figure) are connected in the circuit as shown in figure. Choose the correct answer

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Heat lost per second in the circuit will be 80J

Ratio of heat produced per second in bulbs will be 1: 1

Ratio of heat produced in branch AB to branch CD will be 1:2

Current drawn from the cell is 0.2 A

answer is A.

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Detailed Solution

Total resistance =5003+100+100225600+2002100100+100225+600+2002100=500 ohmRequired heat =2002500=80J

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