Question 19 A(n) sensor is a sensor that generates a voltage in proportion to a change in temperature. pyroelectric pressure photovoltaic ultrasonic Question 20 Low-voltage outdoor lighting is a system that uses ___ to power low-voltage lamps to illuminate walkways, landscaping, or dark areas on a property. 12 V or 24 V 24 V or 48 V 50 V or 75 V 120 V or 240 V

Fiber optics is a technology used to transmit the facts such as light or pulses with fiber or plastic over long distances. Visual fibers are about the width of a human hair strand and, when tied directly to a fiber-optic cable, can transmit multiple long…