一、检验伏打电池产生的直流电流初中物理中有用伏打电池给小灯泡供电的实验,由于伏打电池产生的电流比较微弱,加之小灯泡耗电量大,达0.3安,放电很快,灯泡很快暗下来.而改用音乐集成块来检验,效果十分明显,并能持续很长时间.由于音乐集成块的灵敏度很高,耗电极微,再配之以发声也很灵敏的压电陶瓷片,便构成了一个微弱直流电流检验装置,且价格便宜,仅几角钱,即使是成品,像音乐卡中的集成块连同 First, test the DC current generated by the voltaic battery in the junior high school physics useful voltaic cells to power the experiment of the small light bulb, due to the weak current generated by the voltaic battery, coupled with the small bulb power consumption, up to 0.3 A, discharge quickly, The light bulbs quickly dimmed. The test was replaced with a music block. The effect was obvious and lasted for a long time. Because the sensitivity of the music manifold was very high, the electrode was tiny, and the sound was also very sensitive. The ceramic chip forms a weak DC current test device and is inexpensive, only a few cents, even if it is a finished product, like the integrated block in a music card.