True or False? The first alarm systems used electromagnetic technology.

The statement is true because the earliest alarm systems indeed utilized electromagnetic technology as a means of detection. Historical alarm systems, dating back to the late 19th century, often employed concepts such as electromagnetic circuits and devices to trigger alerts upon unauthorized access or tampering. This technology was among the first to be integrated into alarm systems, effectively allowing them to detect physical breaches by changing a circuit's state when a door or window was opened.

The foundation of many alarm systems involved using magnets and electrical currents to create a closed circuit that would sound an alarm when disrupted. This pioneering use of electromagnetic principles showcases the ingenuity of early security measures. As technology has evolved, alarm systems have incorporated a variety of other technologies, such as motion sensors and video surveillance, but the root of alarm systems can be traced back to electromagnetic technology.