Networks Analysis and Synthesis - Engineering

Q1:

In the circuit, shown the current I marked is given by

A 2.22 A

B 1.78 A

C 4.44 A

D 2 A

ANS:A - 2.22 A

When 9 V source is connected, 2V source is short circuited [Superposition Theorem]. I' = 9/4.5 = 2 A, I1 = 1.5 A when 2 volt source is connected, then Req = 4.5 I2 = 0.22 A I = I1 + I2 = 0.66 A.