Mv, or "megavolt," is a unit of electric potential equal to one million volts. It is commonly used in high-voltage applications, such as power transmission and electrical engineering. The term helps quantify the voltage levels in large electrical systems, ensuring safe and efficient operation. In the context of electricity, Mv is crucial for understanding how electrical energy is distributed over long distances. High-voltage transmission lines often operate in the range of hundreds of kilovolts to several megavolts, allowing for reduced energy loss during transmission. This is essential for delivering power from power plants to cities and industries.