NEETPhysicsAlternating Current
Match List-I with List-II. (A) Pure Inductor (I) Blocks DC completely in steady state (B) Pure Capacitor (II) Offers zero opposition to DC (C) Pure Resistor (III) Impedance is purely resistive and minimum (D) Series LCR circuit at resonance (IV) Opposition to alternating current is independent of frequency Choose the correct answer from the options given below:
Options
- A(A)-(I), (B)-(II), (C)-(IV), (D)-(III)
- B(A)-(II), (B)-(I), (C)-(IV), (D)-(III)
- C(A)-(II), (B)-(I), (C)-(III), (D)-(IV)
- D(A)-(IV), (B)-(I), (C)-(II), (D)-(III)
Correct answer
B. (A)-(II), (B)-(I), (C)-(IV), (D)-(III)
Step-by-step solution
(A) Pure Inductor: The inductive reactance is X_L = 2 f L . For direct current (DC), the frequency f = 0 , so X_L = 0 . It offers zero opposition to DC. Matches with (II). (B) Pure Capacitor: The capacitive reactance is X_C = 1 2 f C . For DC, f = 0 , so X_C = . It blocks DC completely in steady state. Matches with (I). (C) Pure Resistor: The resistance R of a pure resistor does not depend on the frequency of the alternating current. Matches with (IV). (D) Series LCR circuit at resonance: At resonance, the inductiv