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Home / Doubts and Solutions/NEET/Current Electricity

help me with these questions

Asked by Arushi Juyal 12th December 2017, 7:05 AM
Answered by Expert
Answer:
Refer nthe above figure for the currents flowing in the loops. Internal resistance of batteries are shown in red colour.
 
For the loop at right side we can write the equation using kirchoff's law as given below
 
begin mathsize 12px style 4 i subscript 1 space plus space 9 open parentheses i subscript 1 minus i subscript 2 close parentheses space minus 15 plus open parentheses i subscript 1 minus i subscript 2 close parentheses space equals space 25 space 7 i subscript 1 space minus space 5 i subscript 2 space equals space 20 space...................................... left parenthesis 1 right parenthesis end style
 
For the right side loop we can write
begin mathsize 12px style 3 i subscript 2 minus left parenthesis i subscript 1 minus i subscript 2 right parenthesis plus 15 minus 9 open parentheses i subscript 1 minus i subscript 2 close parentheses plus 2 i subscript 2 equals space 10 15 i subscript 2 minus 10 i subscript 1 space equals space minus 5 space.................................... left parenthesis 2 right parenthesis end style

solving (1) and (2) we will get i1 = 5 and i2 = 3
 
Student should workout further to get Potential difference across each resistor
 
Student should ask only one question per post

Answered by Expert 12th December 2017, 3:35 PM
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