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What is the value of the inductive reactance XL in a DC circuit?

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Emily Cortez

Published Mar 02, 2026

What is the value of the inductive reactance XL in a DC circuit?

Why XL (Inductive Reactance) In DC Supply Is Zero (0)?

Correspondingly, what is the value of inductive reactance in DC circuit?

Inductive Reactance against Frequency

The slope shows that the “Inductive Reactance” of an inductor increases as the supply frequency across it increases. Then we can see that at DC an inductor has zero reactance (short-circuit), at high frequencies an inductor has infinite reactance (open-circuit).

Beside above, what is XL in inductance? XL = inductive reactance on ohms, Ω π = Greek letter Pi, 3.142. f = frequency in Hz. L = inductance in henries.

Beside above, what are the values of capacitive and inductive reactance in a DC circuit?

Also as the frequency increases the current flowing through the capacitor increases in value because the rate of voltage change across its plates increases. Then we can see that at DC a capacitor has infinite reactance (open-circuit), at very high frequencies a capacitor has zero reactance (short-circuit).

What is XL and XC in physics?

There are two types of reactance: capacitive reactance (Xc) and inductive reactance (XL). The total reactance (X) is the difference between the two: Total Reactance, X = XL - Xc.

What is the value of inductive reactance?

Example: A coil with an inductance of 0.3 henries is connected to a 120 volt, 60 hertz AC circuit. To determine the current flow in the wire, first find the inductive reactance of the coil. The inductive reactance equals 6.28 times 60 hertz times 0.3 henries which equals 113.1 ohms.

Why there is no frequency in DC?

In a dc supply the value of the signal is constant as we know that's the no changes in the signal value in one time period. As per the relation of the frequency and time period f where, f= frequency and t= time period. So the frequency of the dc supply is the always zero.

What do you mean by inductive resistance?

(rē-ăk′t?ns) Symbol XElectricity. Opposition to the flow of alternating current caused by the inductance and capacitance in a circuit rather than by resistance.

What is pure inductive circuit?

The circuit which contains only inductance (L) and not any other quantities like resistance and capacitance in the circuit is called a Pure inductive circuit. In this type of circuit, the current lags behind the voltage by an angle of 90 degrees.

Why does a capacitor block DC?

Keep in mind that a capacitor act as a short circuit at initial stage and a fully charged capacitor behave as an open circuit. Capacitors resist a changes in voltage while inductors resist a change in current and acts as a short circuit in DC.

What is the relationship between inductive reactance and frequency?

The inductive reactance of an inductor increases as the frequency across it increases therefore inductive reactance is proportional to frequency ( XL α ƒ ) as the back emf generated in the inductor is equal to its inductance multiplied by the rate of change of current in the inductor.

What is the unit of inductive reactance?

ohms

How do you calculate impedance?

In AC circuits, Ohm's Law takes the more general form: E = I⋅Z, where E is voltage and I is current, as before. The new term, Z, is impedance, a vector combination of: Resistance, R (in ohms), with voltage drops in phase with the current.

What is capacitive reactance XC What is its value for DC?

The reactance is large at low frequencies and small at high frequencies. For steady DC which is zero frequency, Xc is infinite (total opposition), hence the rule that capacitors pass AC but block DC.

Capacitive Reactance Xc.

Capacitive reactance, Xc =1
2 fC

What is reactance and inductance?

In electric and electronic systems, reactance is the opposition of a circuit element to the flow of current due to that element's inductance or capacitance. As frequency increases, inductive reactance also increases and capacitive reactance decreases.

What is meant by impedance?

the total opposition to alternating current by an electric circuit, equal to the square root of the sum of the squares of the resistance and reactance of the circuit and usually expressed in ohms. Symbol: Z. Also called mechanical impedance.

What is the difference between inductive reactance and capacitive reactance?

Capacitive reactance (in ohms) decreases with increasing AC frequency. Conversely, inductive reactance (in ohms) increases with increasing AC frequency. Inductors oppose faster changing currents by producing greater voltage drops; capacitors oppose faster changing voltage drops by allowing greater currents.

What is the formula of capacitive reactance?

The formula for calculating the Capacitive Reactance, or impedance of a capacitor is: Capacitive reactance, denoted as x sub c (XC), is equal to the constant one million (or 106) divided by the product of 2p ( or 6.28) times frequency times the capacitance . where: XC = Capacitive reactance measured in ohms.

When capacitor is removed inductive reactance of the circuit is?

When capacitance C is removed, the current lags behind the voltage by π/3. When inductance L is removed, the current leads the voltage by π/3.

What do you mean by inductive reactance Class 12?

Definition: Inductive reactance is the opposition offered by the inductor in an AC circuit to the flow of ac current. It is represented by (XL) and measured in ohms (Ω). Since from phasor diagram for AC circuit with an only resistor, capacitor and inductor.

How do you calculate inductance?

Calculate the inductance using the following formula: Inductance = µ (N squared) A / length, where N is the number of turns in the coil, A is the cross-sectional area of the coil, and length is the length of the coil.

What is the meaning of Wattless current?

An AC circuit containing either capacitor or inductor the current is said to be wattless if the average power consumed in the circuit is zero.

What is the value of XL?

Roman Numerals
LetterValue
XXX30
XL40
L50
LX60

What is XL in LCR circuit?

Module 9.1 LCR Series Circuits. The phase relationship between the supply voltage VS and the circuit current IS depends on the frequency of the supply voltage, and on the relative values of inductance and capacitance, and whether the inductive reactance (XL) is greater or less than the capacitive reactance (XC).

Is inductive reactance positive or negative?

The reactance of an ideal inductor, and therefore its impedance, is positive for all frequency and inductance values. The effective impedance (absolute value) of an inductor is dependent of the frequency and for ideal inductors always increases with frequency.

What is XL formula?

Now when you type a reactance and frequency, you can calculate L and C at that frequency. XL is called as inductive reactence and Xc is called as capacitive reactence. and the formulae[ XL = 2∏fL, XC = 1/2∏fC ] is given in that website. At resonance the reactence will be same for both cacitence and inductance.

Why is the inductance symbol L?

It is customary to use the symbol L for inductance, in honour of the physicist Heinrich Lenz. In the SI system, the measurement unit for inductance is the henry, with the unit symbol H, named in honor of Joseph Henry, who discovered inductance independently of, but not before, Faraday.

Why is inductive reactance measured in ohms?

Inductive reactance is the opposition that an inductor offers to alternating current due to its phase-shifted storage and release of energy in its magnetic field. Reactance is symbolized by the capital letter “X” and is measured in ohms just like resistance (R). Inductive reactance increases with increasing frequency.

What is capacitance and inductance?

Capacitance, as we now know, is the ability to store energy in the form of an electric field. Inductance, which is measured in henries and denoted by the letter L, is the ability to store energy in the form of a magnetic field.

What inductance means?

In electromagnetism and electronics, inductance is the tendency of an electrical conductor to oppose a change in the electric current flowing through it. Inductance is defined as the ratio of the induced voltage to the rate of change of current causing it.

How do you convert inductance to resistance?

Inductance is frequently expressed as micro-Henries, which represents 1,000,000 Henries. To convert to Henries, you would divide the number of micro-Henries by 1,000,000. Calculate reactance, in ohms, by using the formula: Reactance = 2 * pi * Frequency * Inductance. Pi is simply a constant, measured as 3.14.

When XL XC what is the impedance value?

This resultant is called REACTANCE; it is represented by the symbol X; and expressed by the equation X = XL − XC or X = XC − X L. Thus, if a circuit contains 50 ohms of inductive reactance and 25 ohms of capacitive reactance in series, the net reactance, or X, is 50 ohms − 25 ohms, or 25 ohms of inductive reactance.

What's the difference between impedance and resistance?

Resistance is simply defined as the opposition to the flow of electric current in the circuit. Impedance is opposition to the flow of AC current because of any three components that is resistive, inductive or capacitive. It is a combination of both resistance and reactance in a circuit.

What is difference between reactance and impedance?

Impedance is the combination of resistance and reactance. Components known as resistors prevent current from flowing — in other words, they have the property of resistance. Reactance is a property that opposes a change in current and is found in both inductors and capacitors.

What is capacitive reactance XC?

Capacitive Reactance is the complex impedance of a capacitor who's value changes with respect to the applied frequency.

Does a capacitor induced voltage?

The gist of a capacitor's relationship to voltage and current is this: the amount of current through a capacitor depends on both the capacitance and how quickly the voltage is rising or falling. If the voltage across a capacitor swiftly rises, a large positive current will be induced through the capacitor.

What is XC in RLC circuit?

In general for RLC series circuit impedance is given by, Z = R + j X. X = XL – Xc = Total reactance of the circuit. If XL > Xc ; X is positive & circuit is Inductive. If XL < Xc ; X is negative & circuit is Capacitive.

What is impedance unit?

The unit of impedance, like that of resistance, is the ohm. The reciprocal of the impedance, 1/Z, is called the admittance and is expressed in terms of the unit of conductance, the mho unit (ohm spelled backward).

What causes impedance?

the resistance is caused by the collisions of the electrons with the atoms inside the resistors. the impedance in a capacitor is caused by the creation of an electric field. the impedance in an inductor is caused by the creation of a magnetic field.

How is impedance matching done?

Impedance matching to minimize reflections is achieved by making the load impedance equal to the source impedance. If the source impedance, load impedance and transmission line characteristic impedance are purely resistive, then reflection-less matching is the same as maximum power transfer matching.

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