# Capacitive Reactance Formula

## Capacitive Reactance Formula

Students will learn the proper implementation of the Capacitive Reactance Formula by practising questions regularly. It is important for students to revise the Capacitive Reactance Formula on a regular basis. Reactance, which is measured in Ohms and behaves similarly to resistance in an AC circuit, is affected by supply frequency in contrast to resistance, which is frequency-independent. Inductors and capacitors are both impacted by reactance, with each having different effects depending on the supply frequency. As frequency rises, inductive reactance (Xl) increases while capacitive reactance (Xc) decreases. When a DC voltage is applied to a capacitor, as we saw in the RC Network tutorial, the capacitor draws a charging current from the supply and charges up to a value equal to the applied voltage. The charge stored in the capacitor also decreases and discharges when the supply voltage is lowered. However, in an AC circuit, such as a sine wave voltage, the applied voltage signal continuously shifts from a positive to a negative charge at a rate determined by the frequency of the supply. For instance, the supply frequency controls the rate at which the capacitor is continuously charged or discharged.

The internal impedance of the capacitor limits the current that can flow through it as it charges or discharges. This internal impedance is frequently referred to as capacitive reactance and is represented by the Ohms symbol Xc.

## Capacitive Reactance Formula

A capacitor’s resistance to the alternating current is measured by its capacitive reactance, which is represented by the symbol Xc. It is measured in ohms, the same unit used to measure resistance. But compared to resistance, reactance is more complex. This is so that its value can vary according to the electrical signal’s f frequency as it passes through the capacitor.

It is known that a capacitor stores current. Reactance is a term used to describe a circuit element’s resistance to changes in current or voltage in electrical systems. When the DC supply is connected to the capacitor, It charges up to the specified voltage level. As long as the supply voltage is present, it functions as a short-term storage device and keeps this charge.

### What is Capacitive Reactance?

Students are supposed to learn the Capacitive Reactance Formula. It is important for students to learn the topics in detail in order to understand each point given in the chapters. Physics is an important subject, students should cover each chapter to be able to perform well in the examination. Learning the Capacitive Reactance Formula will help students to practice questions. Each question that is based on the Capacitive Reactance Formula needs to be practised by students. It is crucial that students solve each exercise given in a chapter to enhance their knowledge.

### The Formula for Capacitive Reactance

Since capacitive reactance varies with applied frequency, any change in supply frequency will have a significant impact on the capacitive reactance value of the capacitor. The capacitor’s reactance decreases as the frequency applied to it rises (measured in ohms). Similarly, the reactance value of the capacitor increases as the frequency across it decreases. The complex impedance of the capacitor is the name of this variation. Because of the varying frequency, the electrical charge of the electrons on the capacitor plates appears to move more quickly from one plate to the next, creating complex impedance.

### Solved Examples

The Capacitive Reactance Formula is used to solve exercise questions. Frequently solving questions related to the Students will learn the proper implementation of the Capacitive Reactance Formula by practising questions regularly. It is important for students to revise the Capacitive Reactance Formula on a regular basis is necessary. Students are advised to keep practising all of the Capacitive Reactance Formula-related questions. It will be easier for students to retain the Capacitive Reactance Formula for a long time if they practice questions regularly. Students can download solutions to questions about the Capacitive Reactance Formula from the Extramarks website and mobile application in PDF. By making use of the study materials available on the Extramarks website and mobile application, students will be able to regularly practice questions. Students can access a variety of study resources like past years’ papers, sample papers, etc from Extramarks.