Networks Analysis and Synthesis - Engineering

Q1:

In figure, the current I4 is

A 10 ∠0

B 5 ∠90°

C 5 ∠270°

D 10 ∠90°

ANS:B - 5 ∠90°

I4 = I1 + I2 + I3 or I4 = 5∠90° + 5∠0 + 5∠180° = 5∠90°.