An electric cell is a device that converts chemical energy into electrical energy by using electrodes and an electrolyte. An electrode is a conductor that participates in a chemical reaction with the electrolyte, which is a substance that can conduct electricity by producing ions. An electric cell has two electrodes: a positive electrode called the … Read more
Combination of Resistors in Series The combination of resistors in series is a way of connecting two or more resistors in such a way that the same current flows through all of them. The resistors are arranged one after another, and the ends of the first resistor are connected to the ends of the second … Read more
Electrical energy is an important concept in physics and engineering, as well as a practical necessity for everyday life. Electrical energy can be converted from other forms of energy, such as chemical, mechanical, or nuclear energy, and vice versa. Electrical energy can also be stored in batteries, capacitors, or other devices, and used for various … Read more
What is Electrical Resistivity Electrical resistivity is a concept that tells us how difficult it is for electric current to flow through a material. Electric current is the movement of electric charges, such as electrons, in a circuit. Some materials, like metals, allow electric current to flow easily. These materials are called conductors and they … Read more
The story of current electricity is not just about circuits and wires; it’s a tale of human curiosity and ingenuity. It begins with the ancient Greeks, like Thales of Miletus, who discovered static electricity over 2,500 years ago by rubbing amber with fur. However, it wasn’t until the 18th century that scientists like Luigi Galvani … Read more
The Van de Graaff Generator, a remarkable invention in the field of electrostatics, was the brainchild of Robert J. Van de Graaff, an American physicist. He conceptualized and built the first model in 1929. The generator was not just a product of sudden inspiration; it was an evolution of ideas that began with the Kelvin … Read more
The story of capacitors begins in the mid-18th century. Two European scientists, Ewald Georg von Kleist, and Pieter van Musschenbroek, independently discovered that electric charge could be stored. This was the birth of the Leyden jar, the earliest form of the capacitor². Imagine a glass jar filled with water, with a metal wire passing through … Read more
The journey of capacitors began in the 1740s with the invention of the Leyden jar. This was a simple device consisting of a glass jar filled with water and lined with metal on the inside and outside. It could store a high-voltage charge and was the first practical form of a capacitor. The Leyden jar … Read more
The journey of capacitors begins in antiquity. The ancient Greeks discovered that amber when rubbed, could attract light particles—a phenomenon we now understand as static electricity. This observation laid the groundwork for the concept of storing charge. Fast forward to the 18th century, the Leyden jar was invented. It was a simple device that could … Read more
The story of capacitors begins in the 18th century. It was a time of wigs, quills, and the birth of a new kind of electrical device. The earliest capacitors were known as Leyden jars, created around the 1740s. These were simple glass jars filled with water and lined with metal on the inside and outside. … Read more