試題詳解

56. A series RLC circuit is connected to an ac source The resistance, capacitive reactance and inductive reactance are 40 Ω, 80 Ω, and 50 Ω respectively. What is the current () in the circuit?
(A) 3.0 A
(B) 0.040 A
(C) 1.7 A
(D) 1.4 A
(E) 2.4 A