What is the relationship between capacitive reactance and capacitance?
The amount of charging a capacitor can achieve is called capacitance and is measured in Farads, or microfarads, µF. The opposition to the flow of alternating current due to capacitance is called ” capacitive reactance.” It is measured in ohms just like resistance and inductive reactance.
What is the relationship between inductive reactance and inductance?
When current passes through the coil, an electrical field is generated. The field has been “induced.” The bigger the coil or the greater the number of turns, the greater the induced field. This phenomenon is called ” inductance.” Inductive reactance is the name given to the opposition to a changing current flow.
How are inductive reactance and capacitive reactance similar?
Inductive reactance is usually related to the magnetic field surrounding a wire or a coil carrying current. Likewise, capacitive reactance is often linked with the electric field that keeps changing between two conducting plates or surfaces that are kept apart from each other by some insulating medium.
How resonant frequency varies with capacitance and inductance?
In some cases, at certain frequency called resonant frequency, the inductive reactance of the circuit becomes equal to capacitive reactance which causes the electrical energy to oscillate between the electric field of the capacitor and magnetic field of the inductor. This forms a harmonic oscillator for current.
What is XC and XL?
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.
Are capacitors AC or DC?
The difference between DC capacitor and AC capacitor: General capacitors are marked, AC is AC, DC is DC. The ones marked with positive and negative poles can only be used in DC circuits, and the others without positive and negative poles are non-polar.
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 the difference between inductor and inductance?
As nouns the difference between inductance and inductor is that inductance is the property of an electric circuit by which a voltage is induced in it by a changing magnetic field while inductor is (physics) a passive device that introduces inductance into an electrical circuit.
Why does inductor block AC and allows DC?
An inductor dampes AC while allowing DC because it resists a change in current. The equation of an inductor is If you apply DC across an inductor, it will stabilize to some current flow based on the maximum current available from the current / voltage source.
Is reactance the same as impedance?
Whereas DC circuits have resistance, AC circuits often have resistance and another property, known as reactance. Impedance is the combination of resistance and reactance. Reactance is a property that opposes a change in current and is found in both inductors and capacitors.
What causes capacitive reactance?
Capacitive reactance A DC voltage applied across a capacitor causes positive charge to accumulate on one side and negative charge to accumulate on the other side; the electric field due to the accumulated charge is the source of the opposition to the current.
What is the power factor angle?
Power factor defines the phase angle between the current and voltage waveforms, were I and V are the magnitudes of rms values of the current and voltage. Note that it does not matter whether the phase angle is the difference of the current with respect to the voltage, or the voltage with respect to the current.
What happens at resonance frequency?
Resonance describes the phenomenon of increased amplitude that occurs when the frequency of a periodically applied force (or a Fourier component of it) is equal or close to a natural frequency of the system on which it acts.
Why impedance is maximum in parallel resonance?
As a parallel resonance circuit only functions on resonant frequency, this type of circuit is also known as an Rejecter Circuit because at resonance, the impedance of the circuit is at its maximum thereby suppressing or rejecting the current whose frequency is equal to its resonant frequency.
What happens to the quality factor when resonant frequency increases?
Quality factor is directly proportional to resonant frequency. So, if resonant frequency increases quality factor increases. Explanation: The frequency of a system is said to be resonating when the value of the capacitive reactance and the inductive reactance is the same. So, frequency less than resonant frequency.