Contents
- 1 What is the relationship between reactance and inductance?
- 2 How is the reactance of an inductor affected by a change in inductance?
- 3 Which factor determines the inductance value?
- 4 How is current related to inductance and reactance?
- 5 Why does current decrease when resistance and reactance increase?
- 6 How to calculate reactance in capacitive and inductive circuits?
What is the relationship between reactance and inductance?
Reactance is the effect of that inductance at a given frequency. A clear difference because the units for each is different. Inductance is the ability to create a voltage within a conductor or a nearby conductor by changing the current flow in that the first conductor. Reactance is an opposition to a change in current.
How is the reactance of an inductor affected by a change in inductance?
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.
Which factor determines the inductance value?
The greater the number of turns of wire in the coil, the greater the inductance. Fewer turns of wire in the coil results in lesser inductance. More coils of wires indicate a greater amount of magnetic field force for a given amount of coil current.
How does inductance depend on current?
Inductance depends on the size and shape of a given conductor, the number of turns if it is a coil, and the kind of material near the conductor. A coil wound on a soft iron core far more effectively chokes the increase of a current than the same coil with an air core.
What is the relationship of inductive reactance to inductance and frequency?
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.
It shows that in inductive circuit, Current is inversely proportional to the inductive reactance as well as inductance “L” as inductance and inductive reactances “XL” are directly proportional to each others. Let’s check with an example to see how current reduced by inductive reactance.
Why does current decrease when resistance and reactance increase?
When resistance increases, the circuit current decreases and vice versa. Inductance is directly proportional to the inductive reactance.
How to calculate reactance in capacitive and inductive circuits?
Sketch voltage and current versus time in simple inductive, capacitive, and resistive circuits. Calculate inductive and capacitive reactance. Calculate current and/or voltage in simple inductive, capacitive, and resistive circuits. Many circuits also contain capacitors and inductors, in addition to resistors and an AC voltage source.
Is the inductive reactance 0 for DC current?
Frequency f being 0 for a DC current, the inductive reactance too is 0. But doesn’t the back EMF produced when a switch is turned on oppose DC current too? Wont that count as an opposition? When you turn a switch on you are starting the flow of current.