資源簡介

【實驗指導】新版教科版小學科學四年級下冊2.8模擬安裝照明電路
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理解與應用
電路連接的方法有串聯和并聯兩種。我們家里的家用電器一般都是并聯的。一節電池的電壓是1.5V，兩節電池串聯起來的電壓就是3V。所以把電池串聯起來小燈泡會更亮些。兩節電池并聯起來，電壓還是1.5V，所以小燈泡不會太亮。
電路中的電壓超過了小燈泡上標的1.5V，燈泡太亮會燒壞燈泡的。電池串聯，電壓為3V，小燈泡亮，電池并聯，電壓仍然是1.5V，小燈泡暗。
精煉反饋
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