In pure inductor circuit, voltage is calculated by

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V=iX_L

Explanation: In a pure inductor circuit, the voltage across the inductor is calculated using the formula $V = iX_L$, where $X_L$ represents the inductive reactance. This option (B) is correct because in an ideal inductor, the voltage leads the current by 90 degrees. Working Principle: An inductor opposes changes in current, which results in a voltage that is proportional to the rate of change of current. The inductive reactance $X_L$ is given by the formula $X_L = \omega L$, where $\omega$ is the angular frequency and $L$ is the inductance. Key Formulas: $V = iX_L$ — Voltage across the inductor; $X_L = \omega L$ — Inductive reactance Key Points: In a pure inductor, the current lags the voltage by 90 degrees.; The opposition to current change is quantified by inductive reactance. Advantages: Useful in filtering applications; Essential in energy storage circuits Disadvantages: Can cause phase delays in AC circuits; May introduce unwanted resonance Applications: Used in power supply circuits; Common in radio frequency applications Additional Info: Standard Values: Inductive reactance values vary depending on frequency and inductance.. Wrong Options Explained: Option A ($V = iR$) is for resistors only; Option C ($V = iX_C$) refers to capacitors; Option D ($V = iL_C$) is incorrect notation. Answer: B is correct — Voltage is directly related to inductive reactance in a pure inductor circuit. Exam Tip: Remember that in AC analysis, the relationships between voltage, current, and impedance vary significantly compared to DC circuits.

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