The International System of Units (SI) functions as the global standard for measurement. It encompasses a logical set of units that are founded on fundamental physical quantities. These base units, such as the meter for length and the kilogram for mass, serve as the foundation for calculating other units within the system. The SI system employs a d
Principles of Relay Construction and Application
Relays are electromechanical devices that utilize an electromagnet to switch an electrical circuit. The basic design 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 contro