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点亮小灯泡

点亮小灯泡. ＋. 正极. 负极. －. 玻璃泡. 灯丝. 金属架. 上连接点. 螺纹金属壳. 下连接点. 玻璃泡. 灯丝. 金属架. 上连接点. 上连接点. 螺纹金属壳. 下连接点. 通路. 断路. 短路. 断路. 通路. 断路 短路. 作业： 1 . 留意生活中见到的各种灯泡，观察并思考它们的连接点分别在哪里 2. 留意家中的电器，那些是使用电池作为电源的？ 3 . 询问父母，家里每月用电最高和最低分别是多少？ 4. 提出家庭节约用电的建议。 5. 点亮两个小灯泡.

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点亮小灯泡

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  1. 点亮小灯泡

  2. ＋ 正极 负极 －

  3. 玻璃泡 灯丝 金属架 上连接点 螺纹金属壳 下连接点

  4. 玻璃泡 灯丝 金属架 上连接点 上连接点 螺纹金属壳 下连接点

  5. 通路

  6. 断路

  7. 短路

  8. 断路

  9. 通路

  10. 断路 短路

  11. 作业： 1 .留意生活中见到的各种灯泡，观察并思考它们的连接点分别在哪里 2.留意家中的电器，那些是使用电池作为电源的？ 3 .询问父母，家里每月用电最高和最低分别是多少？ 4.提出家庭节约用电的建议。 5.点亮两个小灯泡

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