Voltage drop across capacitor – formula & concepts

A Capacitor is an important component in an electrical circuit. We have discussed different types of capacitors in other articles. Like other components (resistors, inductors), a capacitor also offers opposition to the current flow (Direct current only) through it. That means it generates impedance. Ohm’s law tells us that an impedance causes a voltage drop. … Read more

Capacitance of Earth in microfarad | formula value

To find the capacitance of Earth we consider that the Earth is a spherical conductor with radius R and total charge Q. In fact, using this assumption one can determine the capacitance of any planet and satellite like Mercury, Mars, Moon, etc. In this article, we are going to find the capacitance of Earth in … Read more

Formula for energy stored in a capacitor – Derive

A capacitor can store electric charges and releases them whenever it is required. But how can a capacitor store energy in it? What is the formula of energy stored in a capacitor? The application of an external voltage across a capacitor produces an electric field between the plates of the capacitor. This electric field moves … Read more

Capacitance of parallel plate capacitor with dielectric medium

In the previous article, I explained the capacitance of different types of capacitors. A parallel plate capacitor is one of the most popular capacitors and it has wide applications in electrical circuits. In this article, I’m going to explore the capacitance of a parallel plate capacitor and its behavior in presence of a dielectric medium … Read more

Formula for Capacitance of a Capacitor – spherical, cylindrical

A Capacitor is one of the most useful circuit components. A capacitor can store electric charge or electric energy in it. The capacitor is nothing but a conductor or the combination of two conductors having equal and opposite charges. Then what makes the capacitor different from a conductor? What are the different types of capacitors? … Read more