What is reactance and its formula?

What is reactance and its formula?

Ans- The measure of opposition to current flow offered by a material is known as resistance, denoted by R. The resistance offered to ac currents only by inductors and capacitors is known as reactance, denoted by X. For capacitor X=1/(2πfC), where f is frequency, and C is capacitance.

What is reactance in circuit?

reactance, in electricity, measure of the opposition that a circuit or a part of a circuit presents to electric current insofar as the current is varying or alternating. Steady electric currents flowing along conductors in one direction undergo opposition called electrical resistance, but no reactance.

How do you calculate impedance and reactance?

The formula Z = R + jX is represented by the picture above. You can see that: The reactances are on the y-axis (the imaginary axis) and they may go up or down, depending on wish influence is higher, the one of the capacitor or the one of the inductor. The resistance is always on the X-axis.

How is reactance calculated?

The formula for calculating the inductive reactance of a coil is: inductive reactance, or XL, is the product of 2 times p (pi), or 6.28, the frequency of the ac current, in hertz, and the inductance of the coil, in henries. XL =2p x f x L. L = the inductance value of the coil in henries.

How do you calculate total reactance?

Subtract inductive and capacitive reactance to get total reactance. Because one of these effects increases as the other decreases, these tend to cancel each other out. To find the total effect, subtract the smaller one from the larger. Calculate impedance from resistance and reactance in series.

How are henries calculated?

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 reactance and impedance?

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. Because it only affects changing current, reactance is specific to AC power and depends on the frequency of the current.

How do you calculate Z impedance?

Formula Cheatsheet

1. Impedance Z = R or XLor XC(if only one is present)
2. Impedance in series only Z = √(R2 + X2) (if both R and one type of X are present)
3. Impedance in series only Z = √(R2 + (|XL – XC|)2) (if R, XL, and XC are all present)
4. Impedance in any circuit = R + jX (j is the imaginary number √(-1))

How is admittance calculated?

Admittance of an AC circuit is the reciprocal of its impedance. Using the impedance value one can easily derive the Admittance values of the circuit. where ‘Z’ is the impedance, Z = R+jX. So, admittance ‘Y’ can be written as, Y = 1/R+jX.

What is inverse reactance?

Similarly, the inverse of reactance is called “Susceptance”. The inverse of impedance is called “Admittance”. Conductance, Susceptance, and Admittance are all denoted by the variables Y or G, and are given the units Siemens.

How is reactance measured?

When the alternating current goes through a pure reactance, a voltage drop is produced that is 90° out of phase with the current. Reactance is mathematically symbolized by the letter “X” and is measured in the unit of ohms (Ω).

How do you find total inductive reactance?

Inductive Reactance (X L) Calculations Work out the answers using pencil and paper; redraw the circuit you are working on. List the items of information you are given, and what you need to find for your answer. Once you have listed the information in step 2 (above), you will need to decide on which appropriate formula (or formulae) to use.

How to calculate required resistance?

How to calculate resistance? We will identify values first. I = 3.5 Amp V = 32 volts Write down the Ohm’s equation. V = IR Substitute values in the resistance formula.

How to find capacitive reactance?

Capacitive reactance is the opposition that a capacitor offers to alternating current due to its phase-shifted storage and release of energy in its electric field.

Capacitive reactance can be calculated using this formula: XC = 1/(2πfC)

Capacitive reactance decreases with increasing frequency.

What is the unit of capacitive reactance?

Capacitive reactance has units of ohms. (The unit of capacitance is farad .) Because inductive reactance X L causes the voltage to lead the current and capacitive reactance X C causes the voltage to lag behind the current, total reactance X is their difference—that is, X = X L – X C.