Networks Analysis and Synthesis - Engineering

Q1:

If sequence currents Ia1 = 2 ∠- 90°, Ia2 = 0.2 ∠ 90° and Ia3 = 1.8 ∠ 90°, Ia =

A 0

B 1

C 4

D
8

ANS:C - 4

Ia = Ia1 + Ia2 + Ia0 = 2∠-90 + 0.2∠90 + 1.8∠90° = 2∠-90° + 2∠90° = 0.