| 摘要 |
PROBLEM TO BE SOLVED: To provide a science teaching material which allows a user to easily understand a state of magnetic force generation when current flows a coil, in which, when a sound generation member is exchanged, a user can easily recognize change of a vibration state or tone color, and can understand easily a step for generating sound by action of electro-magnetic force and using as a speaker, thereby children and adults can enjoy science experiment and have an interest in science.SOLUTION: A science teaching material comprises: a box-state base table 21; a coil 22 which is detachably attached to an upper plate 21a forming the base table 21l a reception member 4 attached to the coil 22 or the upper plate 21a; a vibration body 3 guided by the reception member 4; and a signal source 10 for applying a signal to the coil 22. The vibration body is formed of a sound generation member 33, and a lower holding body 32 and an upper holding body 31 for vertically holding the sound generation member 33 and are formed of magnets.SELECTED DRAWING: Figure 1 |
