Question

Find IT in the figure shown below.

(a) 0.66∠-20.5⁰

(b) 0.66∠20.5⁰

(c) 0.77∠20.5⁰

(d) 0.77∠-20.5⁰

This question was posed to me by my school teacher while I was bunking the class.

Question is from Parallel Circuits topic in section Complex Impedence of Network Theory

Answer 1

Right answer is (d) 0.77∠-20.5⁰

Explanation: The current lags behind the applied voltage by 20.5⁰. Total current IT = VS/ZT = 20/25.87∠20.5^o=0.77∠-20.5^o.