Difficulty: Easy
Correct Answer: 754 Ohm
Explanation:
Introduction / Context:
Inductive reactance quantifies how an inductor opposes AC. It increases with both inductance and frequency. Quick calculations of X_L are essential in designing filters, chokes, and setting impedance levels in power and signal circuits.
Given Data / Assumptions:
Concept / Approach:
The standard relationship is X_L = 2 * pi * f * L. Units: X_L in ohms when f is in hertz and L in henries. The result typically rounds to the nearest ohm for component selection and approximate analysis.
Step-by-Step Solution:
Verification / Alternative check:
Use approximate pi = 3.14: X_L ≈ 2 * 3.14 * 60 * 2 = 753.6 Ω, which rounds to 754 Ω, confirming the calculation.
Why Other Options Are Wrong:
Common Pitfalls:
Forgetting the factor 2 * pi, mixing up inductive with capacitive reactance, or rounding too early leading to large errors.
Final Answer:
754 Ohm.
Discussion & Comments