FAQ

# What is omega in electronics

## What causes inductive reactance?

Inductive reactance is associated with the magnetic field that surrounds a wire or a coil carrying a current. An alternating current in such a conductor, or inductor, sets up an alternating magnetic field that in turn affects the current in, and the voltage (potential difference) across, that part of the circuit.

## What is reactance formula?

The potential difference and rate of change of current are proportional to each other. The inductive reactance for an inductor with inductance L connected in the circuit along with AC power supply is given as: XL = 2πfL. Where, XL is the inductive reactance.

## What is an inductive circuit?

[in′dək·tiv ′sər·kət] (electricity) A circuit containing a higher value of inductive reactance than capacitive reactance.

## Why do we use inductors in AC circuits?

Inductors store their energy in the form of a magnetic field that is created when a voltage is applied across the terminals of an inductor. The growth of the current flowing through the inductor is not instant but is determined by the inductors own self-induced or back emf value.

## What is difference between resistance and reactance?

Mathematically, resistance is simply voltage divided by current. 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.

## What is called impedance?

Electrical impedance, measure of the total opposition that a circuit or a part of a circuit presents to electric current. Impedance includes both resistance and reactance (qq.

## What is inductor formula?

The inductor equation tells us: v = L d i d t v = text L,dfrac{di}{dt} v=Ldtdi. This says the voltage across an inductor is proportional to the rate of change of the current through the inductor. Since the current source provides a constant current, the rate of change, or slope, of the current is 0.

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## What is measured in Ohm?

The ohm is defined as an electrical resistance between two points of a conductor when a constant potential difference of one volt, applied to these points, produces in the conductor a current of one ampere, the conductor not being the seat of any electromotive force.

## 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 a pure resistive circuit?

A purely resistive circuit is a circuit that has inductance so small that at its typical frequency, its reactance is insignificant as compared to its resistance. Furthermore, in a purely resistive circuit, the whole of the utilized voltage is consumed in overcoming the ohmic resistance of the circuit itself.

## What is the power factor of a pure inductive circuit?

Power Factor Values

For the purely inductive circuit, the power factor is zero, because true power equals zero.

## Why does a capacitor block DC?

We know that there is no frequency i.e. 0Hz frequency in DC supply. If we put frequency “f = 0″ in the inductive reactance (which is AC resistance in capacitive circuit) formula. If we put XC as infinity, the value of current would be zero. That is the exact reason why a capacitor block DC.

## Where is inductor used?

Inductors are widely used in alternating current (AC) electronic equipment, particularly in radio equipment. They are used to block AC while allowing DC to pass; inductors designed for this purpose are called chokes.

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## 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 … … meaning that the rate of change of current is proportional to voltage and inversely proportional to inductance.