Discussion :: Exam Questions Paper
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Find I for circuit shown below
Answer : Option C
Explanation :
Mesh Analysis
Apply KVL at loop 2
125i2 - 100i3 = 0 ...(i)
Apply KVL at loop 3
120i3 - 100i2 - 20i1 = 0
i1 = 5A
∴ 120i3 - 100i2 - 100 = 0
∴ 120i3 - 100i2 = 100 ...(ii)
From (i) 125i2 - 100i3 = 0
...(iii)
Put equation (iii) in eq. (ii)
120i 3 - 100i2 = 100
120 x - 100i2 = 100
150i2 - 100i2 = 100
∴ 50i2 = 100
∴ i2 = 2A.
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