EXPERIMENT 196. To study the action of a simple "electric bell," or a "buzzer."
467. Directions. (A) [Fig. 156] shows the circuit explained in [Exp. 195], with a key or push-button put in, so that the circuit can be closed at a distance from the vibrating armature.
(B) Have a friend work the key while you hold I and wires 1 and 2 as directed in [Exp. 195]. The circuit must not be broken at two places, of course, so begin by holding the two connectors together. The armature should vibrate rapidly each time K is pressed.
468. Electric Bells and Buzzers are very nearly alike in construction; in fact, you will have a buzzer by removing the bell from an ordinary electric bell. Buzzers are used in places where the loud sound of a bell would be objectionable.
By placing a bell near the end of the vibrating armature ([Fig. 156]), so that the bell would be struck by it at each vibration, we should have an electric bell. By making the wires 1 and 3 long, the bell or buzzer can be worked at a distance. (See Apparatus Book, Chapter XV, for Home-made Bells and Buzzers.)
