In the following circuit E1=4V,R1=2Ω E2=6V,R2=2Ω and R3=4Ω. The current i1 is
A
1.6 A
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B
1.8 A
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C
2.25 A
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D
1 A
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Solution
The correct option is B1.8 A For loop (1) - 2i1−2(i1−i2)+4=0⇒2i1−i2=2 ......(i) For loop (2) - 4i2+2(i1−i2)+6=0⇒3i2−i1=3 .......(ii) After solving equation (i) and (ii) we geti1=1.8A and i2=1.6A