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Inductive Reactance

Easyphysics

Inductive reactance X_L in AC of angular frequency ω is:

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ω L

L/ω

1/(ω L)

ω / L

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Subject: physics
Chapter: electromagnetic induction and ac
Topic: inductive reactance
Difficulty: Easy
Year: 2025

Solution

Correct Answer:

ω L

In an AC circuit, an inductor opposes the flow of alternating current. This opposition is called Inductive Reactance ( $X_{L}$ ). $X_{L} = ω L = 2 π f L$

$X_{L}$ is directly proportional to frequency ( $f$ ).
For DC ( $f = 0$ ), $X_{L} = 0$ (inductor acts as a short circuit).
Current lags behind voltage by $9 0^{\circ}$ in a purely inductive circuit.

This easy difficulty physics question is from the chapter electromagnetic induction and ac, covering the topic of inductive reactance. It appeared in the 2025 exam.

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Inductive Reactance

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