Suppose an AC circuit has a resistance of 20 Ω and an inductive reactance of 15 Ω. What is the impedance of the circuit?
Q1. Suppose an AC circuit has a resistance of 20 Ω and an inductive reactance of 15 Ω. What is the impedance of the circuit?
Answer: 25 Ω
Explanation: The correct answer is 25 Ω because impedance (Z) is the vector sum of resistance (R) and reactance (X). Z = √(R^2 + X^2). Option A is just the resistance, option B is just the reactance, and option D is the result of a calculation error.