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Solution of Practice problems for Test1

Solution of Practice problems for Test1 - Solution of...

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Solution of Practice problems for Test1 1. (2.11 in text) In the circuit of Fig. 1, calculate V 1 and V 2 . Fig. 1 1 1 1 5 0 6 V V V + + = ⎯⎯→ = 2 2 5 2 0 3 V V V − + + = ⎯⎯→ = 2. (2.13 in text) For the circuit in Fig. 2 use KCL to find the branch currents I 1 to I 4 . I 2 7A I 4 1 2 3 4 4A I 1 3A I 3 Fig. 2 At node 2, 3 7 0 10 2 2 + + = ⎯ → = − I I A At node 1, I I I I A 1 2 1 2 2 2 12 + = ⎯ → = = At node 4, 2 4 2 4 2 4 4 = + ⎯ → = = − I I A At node 3, 7 7 2 5 4 3 3 + = ⎯ → = = I I I A Hence, I A I A I A I A 1 2 3 4 12 10 5 2 = = − = = − , , , + V 1 _ + V 2 _ + 5 V _ + 1 V 2 V 2A
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