Electricity Forming Indicator 發電原理說明器
此說明器由一個2500turns 線圈, 長膠管10 x 50dia. x L 兩枚, 棒形磁石, 黃色LED 有電顯示器組成, 如圖所示. 當棒形磁鐵放下並穿過有電顯示器, 線圈便因磁感作用而產生電, LED 於是便閃一閃說明.
containing 2500 turns coil, the LED will light when the bar magnet is swinging inside the long tube and induce magnetic field through the coil.
Item No : JP 120-090