What opposes a change in current due to inductance?

What opposes a change in current due to inductance?

• A. Resistance
• B. Capacitive reactance
• C. Inductive reactance
• D. Power factor

Answer: (C)

Inductive reactance is a property of inductors that opposes changes in current flow through them. When the current flowing through an inductor changes, a magnetic field is created. According to Lenz's Law, this magnetic field will induce a counter EMF (electromotive force) that opposes the change in current. The relationship between the induced voltage, the rate of change of current, and the inductance defines the inductive reactance. Inductive reactance is calculated using the formula \( XL = 2\pi fL \), where \( f \) is the frequency of the alternating current (AC) and \( L \) is the inductance. Consequently, the higher the frequency or the inductance, the more the inductive reactance opposes the change in current. This characteristic is fundamental to the behavior of inductors in AC circuits, making inductive reactance critical for understanding how inductors function in various applications, including filtering, oscillation, and energy storage. The other options relate to different aspects of electrical circuits but do not directly oppose a change in current due to inductance. Resistance does oppose current flow but is not specific to changes caused by inductance. Capacitive reactance involves capacitors, which

Inductive reactance is a property of inductors that opposes changes in current flow through them. When the current flowing through an inductor changes, a magnetic field is created. According to Lenz's Law, this magnetic field will induce a counter EMF (electromotive force) that opposes the change in current. The relationship between the induced voltage, the rate of change of current, and the inductance defines the inductive reactance.

Inductive reactance is calculated using the formula ( XL = 2\pi fL ), where ( f ) is the frequency of the alternating current (AC) and ( L ) is the inductance. Consequently, the higher the frequency or the inductance, the more the inductive reactance opposes the change in current. This characteristic is fundamental to the behavior of inductors in AC circuits, making inductive reactance critical for understanding how inductors function in various applications, including filtering, oscillation, and energy storage.

The other options relate to different aspects of electrical circuits but do not directly oppose a change in current due to inductance. Resistance does oppose current flow but is not specific to changes caused by inductance. Capacitive reactance involves capacitors, which