Question Detail
Question
An inductor of inductance 4.0 mH has resistance 15 Ω. Impedance when inductive reactance equals resistance?
Correct Answer
Option A is the correct answer.
Detailed Explanation
X_L = R = 15 Ω. Z = √(R² + X_L²) = √(225+225)=√450=21.21 Ω.
Hint
Z = √(R² + X_L²).