Networks Analysis and Synthesis - Engineering

Q1:

If operator 'a' = 1 ∠120° then (1 + a2) =

A
3

B
3 ∠30°

C
3 ∠ - 30°

D
3 ∠60°

ANS:A -

3

1 - a2 = 1 + 0.5 + j 0.866 = 3∠30°.