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electronics and communication engineering exam question papers
1. Find I for circuit shown below
(A): 0 A
(B): 1 A
(C): 2 A
(D): 3 A
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By: guest on 02 Jun 2017 12.56 am
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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