MP Board · Class 12 · Physics · Alternating CurrentDefine Inductive Reactance ($XL$). How does it depend on the frequency of alternating current?
Step-by-Step Solution
Inductive reactance is defined as the opposition offered by an inductor to the flow of alternating current through it. It is denoted by $X_L$ and measured in Ohms ($\Omega$). The mathematical formula for inductive reactance is $X_L = \omega L = 2\pi f L$, where $f$ is the frequency of AC and $L$ is inductance. Inductive reactance is directly proportional to the frequency of the alternating current ($X_L \propto f$). For direct current ($f=0$), the inductive reactance is zero, allowing DC to pass freely without hindrance.
💡 Study Guide: This question tests core syllabus concepts from Alternating Current. For formulas, key summaries, and mock exam reference guides, read the full Alternating Current Revision Notes.