DC Electric Bell for Classroom and Lab Demonstrations Key benefits Clear demonstration of DC electric bell principles for physics lessons and classroom labs. Ready to use out of the box, saving setup time and ensuring reliable demonstrations. Simple wiring and low voltage operation make it suitable for teaching, experiments, and hobby projects. Features and specifications Function: DC electric bell that rings when driven by a 4 to 6V DC power supply. Includes connection wire and a storage box; the bell is pretested before . Designed to work with air extraction devices for air sound transmission experiments and other acoustic demonstrations. Contact point on the vibrating element can be cleaned with sandpaper if oxidation affects performance. How it solves problems Makes abstract electromagnetic and oscillation concepts tangible by producing a visible and audible response. Compact and selfcontained design reduces the need for complex lab setups. Pretesting and included wiring minimize troubleshooting and lost class time. Operation and maintenance tips Connect the provided wire to a 4 to 6V DC power source to sound the bell. Do not exceed the recommended voltage or leave the power on continuously. If the bell stops sounding clearly, gently clean the contact point of the vibrating element with fine sandpaper to remove oxide buildup. Store the bell in the supplied box in a dry, noncorrosive environment to preserve functionality. Practical use scenarios Physics classroom demonstration of electromagnetism, circuit switching, and mechanical oscillation. Laboratory or workshop experiments on sound transmission using an air extraction device. Homework projects or hobby electronics kits requiring a low voltage audible indicator. This electric bell offers a straightforward, durable tool for teaching and experimenting with DC electromagnetic principles while remaining easy to operate and maintain.