The story of hysteresis begins in the 19th century, but its roots stretch back to ancient times. The word “hysteresis” itself comes from an Ancient Greek word meaning “deficiency” or “lagging”. This term was chosen because it perfectly describes how certain materials react to changes not immediately, but with a delay, or lag. In 1881, … Read more
The story of magnetism began over 2,500 years ago with the discovery of lodestones. These are naturally occurring magnets, found in the Magnesia region, hence the name ‘magnet’. Ancient Greeks, including the philosopher Thales of Miletus, observed that these stones could attract iron pieces. During the Middle Ages, people began to understand more about magnetism. … Read more
The story of Earth’s magnetic field is as old as the planet itself. It’s a tale of discovery, mystery, and scientific breakthroughs. Long before the term “magnetic field” was coined, ancient navigators used lodestones, naturally magnetized pieces of the mineral magnetite, to navigate the seas. The Chinese were among the first to notice that these … Read more
The story of bar magnets begins with the discovery of lodestones, naturally magnetized pieces of the mineral magnetite, which were used by ancient civilizations for navigation. The term “magnet” comes from Magnesia, a region in modern-day Turkey, where lodestones were found in abundance. In China around 1000 CE, magnetized iron bars, known as lodestones, were … Read more
The moving coil galvanometer is a refined version of the original galvanometer, which was an early instrument used to detect and measure electric currents. The journey of the galvanometer began with the discovery by Hans Christian Ørsted in 1820 that a magnetic compass needle deflects when it is near a wire carrying an electric current. … Read more
The 19th century was a period of remarkable scientific discovery, particularly in the field of electromagnetism. Before this era, electricity and magnetism were thought to be unrelated phenomena. The real breakthrough came in 1820 when Ørsted, a Danish physicist, discovered that a compass needle was deflected when placed near a wire carrying an electric current. … Read more
The story begins in the early 19th century. Before this time, electricity and magnetism were thought to be unrelated phenomena. It was the era of scientific giants like Hans Christian Ørsted and André-Marie Ampère, who were about to uncover the deep connection between these two forces of nature. In 1820, Ørsted discovered that a compass … Read more
The story of the toroid begins with the foundational work of Michael Faraday, a pioneering scientist in the field of electromagnetism. In 1830, Faraday made a groundbreaking discovery that would lead to the invention of the toroid. Faraday observed that when a magnetic field changes over time, it induces an electric voltage in a nearby … Read more
The story of the solenoid begins with the innovative work of André-Marie Ampère, a French physicist whose name is now synonymous with the unit of electric current, the ampere. In the 1820s, Ampère was fascinated by the relationship between electricity and magnetism, which was a hot topic in scientific circles of the time. Ampère conceived … Read more
The story of Ampere’s Law begins with a remarkable discovery in the early 19th century. In 1820, Danish physicist Hans Christian Ørsted found that an electric current creates a magnetic field around it. This was observed when a compass needle placed near a wire carrying an electric current turned to align perpendicularly to the wire. … Read more