Suppose an AC circuit has a resistance of 10 Ω and a capacitive reactance of 20 Ω. What is the impedance of the circuit?
Q1. Suppose an AC circuit has a resistance of 10 Ω and a capacitive reactance of 20 Ω. What is the impedance of the circuit?
Answer: 15 Ω
Explanation: The correct answer is 15 Ω because impedance (Z) is the vector sum of resistance (R) and reactance (X). Z = √(R^2 - X^2) for a capacitive circuit. Option B is the reactance, option C is the result of a calculation error, and option D is the result of an incorrect calculation.