engineering physics MCQ #51

The impedance of a coil is 10 Ω at 50 Hz. At 100 Hz, it is

engineering physics MCQ #51

  1. Question 1

    Q1. The impedance of a coil is 10 Ω at 50 Hz. At 100 Hz, it is

    • A) 20 Ω
    • B) 10 Ω
    • C) > 10 Ω
    • D) < 10 Ω

    Answer: > 10 Ω

    Explanation: Z = √(R² + (ωL)²), and since ωL increases with frequency, Z > 10 Ω at 100 Hz.