The International System of Units (SI), often dubbed the metric system, is a standardized system for quantifying physical quantities. It's universally accepted worldwide and forms the basis of scientific exchange. The SI system consists of seven base units, which serve as the foundation for all other units. These include: meter (length), kilogram (

Relays are electromechanical instruments that utilize an electromagnet to switch an electrical path. The basic structure of a relay comprises a coil, armature, contacts, and a spring mechanism. When current flows through the coil, it creates a magnetic field which attracts the armature, causing the contacts to connect. This action allows for the co