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測小燈泡電功率
測小燈泡電功率
更新时间:2024-10-08 05:17:29

  1、用“伏安法”測定小燈泡的電功率,根據電功率的計算公式P=UI。

  2、實驗器材:電源、開關、電流表、電壓表、滑動變阻器、小燈泡(額定電壓2.5?V)、導線。

  3、用電壓表測量小燈泡兩端的電壓,用電流表測量通過小燈泡的電流,就可以求出小燈泡的實際功率。

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