Why does the inductive reactance lag the voltage?
Inductive Reactance against Frequency Also as the frequency increases the current flowing through the inductor also reduces in value. That is the current lags the voltage by 90o through a pure inductor.
How does inductive reactance affect a circuit?
Inductive reactance is expressed in ohms. Because inductive reactance XL causes the voltage to lead the current and capacitive reactance XC causes the voltage to lag behind the current, total reactance X is their difference—that is, X = XL – XC.
Does reactance affect voltage?
In electrical circuits, reactance is the opposition presented to alternating current by inductance or capacitance. Greater reactance gives smaller current for the same applied voltage.
What causes inductive reactance?
Inductive reactance is caused by devices in which wire is wound circularly — such as coils (including line reactors), chokes, and transformers. Reactance that occurs in a capacitor is known as capacitive reactance.
What is the relationship between inductive reactance and inductance?
The inductive reactance of a component is directly proportional to the inductance of the component and the applied frequency to the circuit. By increasing either the inductance or applied frequency, the inductive reactance will likewise increase and present more opposition to current in the circuit.
What happens when inductive reactance is equal to capacitive reactance?
Resonance in an AC circuit Consider what happens with the impedance equation: When the inductive and capacitive reactances are equal, a number of things happen: This condition is known as resonance.
When an inductor is connected to an AC source the voltage lags a current by?
We also learned the phase relationships among the voltages across resistor, capacitor and inductor: when a sinusoidal voltage is applied, the current lags the voltage by a 90º phase in a circuit with an inductor, while the current leads the voltage by 90∘ in a circuit with a capacitor.
What is inductive reactance and capacitive reactance?
If the reactance releases energy in the form of a magnetic field, it is called inductive reactance whereas if the reactance releases energy in the form of an electric field, it is called capacitive reactance.
What do you mean by inductive reactance?
Inductive reactance is the name given to the opposition to a changing current flow. This impedance is measured in ohms, just like resistance. In inductors, voltage leads current by 90 degrees. The inductive reactance equals 6.28 times 60 hertz times 0.3 henries which equals 113.1 ohms.
What is the phase relationship between current and voltage in an inductor?
The phase relationship between current and voltage in an AC circuit containing only inductor is that voltage always leads the current flowing through the circuit by 90 degree or pi/2 radians. When a sinusoidal input is provided to the circuit, the current increases from zero to the maximum value.
What is the value power factor when inductive reactance becomes equal to the capacitive reactance?
So that when frequency is reduced to half, then inductive reactance becomes half & capacitive reactance becomes double of it’s previous value. Power factor = c o s ( θ ) = 2 5 l e a d i n g .
When inductor is connected to an AC source current?
This means that with an increase in impedance the current will decrease. Therefore, with an increase in the inductance the reactance increases, and the current in the circuit decreases, when the voltage is kept constant. So, the correct answer is “Option C”.
What is the difference between voltage and inductor reactance?
V = voltage in volts. I = current in amps. The inductive reactance of an inductor is dependent upon its inductance as well as the frequency that is applied. The reactance increases linearly with frequency.
Why does current lag behind voltage in an inductive circuit?
This causes the current to lag behind the voltage that is producing it. In inductive circuits there will always be an element of resistance so pure inductance is impossible to achieve without super conductors.
What is indinductive reactance of DC current?
Inductive reactance is mostly low for lower frequencies and high for higher frequencies. It is, however, negligible for steady DC current. W – is angular frequency of AC voltage source.
What is the reactance of an inductor at high 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).