甲乙两灯分别标有"3V,3W""6V,12W"字样,将它们串联后接在9V的电源上,求1:R甲和R乙 2:甲,乙两灯的实际电压 3:甲乙两灯的发光情况
来源:学生作业帮助网 编辑:作业帮 时间:2024/06/25 06:14:56
![甲乙两灯分别标有](/uploads/image/z/10263012-60-2.jpg?t=%E7%94%B2%E4%B9%99%E4%B8%A4%E7%81%AF%E5%88%86%E5%88%AB%E6%A0%87%E6%9C%89%223V%2C3W%22%226V%2C12W%22%E5%AD%97%E6%A0%B7%2C%E5%B0%86%E5%AE%83%E4%BB%AC%E4%B8%B2%E8%81%94%E5%90%8E%E6%8E%A5%E5%9C%A89V%E7%9A%84%E7%94%B5%E6%BA%90%E4%B8%8A%2C%E6%B1%821%EF%BC%9AR%E7%94%B2%E5%92%8CR%E4%B9%99+2%EF%BC%9A%E7%94%B2%2C%E4%B9%99%E4%B8%A4%E7%81%AF%E7%9A%84%E5%AE%9E%E9%99%85%E7%94%B5%E5%8E%8B+3%EF%BC%9A%E7%94%B2%E4%B9%99%E4%B8%A4%E7%81%AF%E7%9A%84%E5%8F%91%E5%85%89%E6%83%85%E5%86%B5)
甲乙两灯分别标有"3V,3W""6V,12W"字样,将它们串联后接在9V的电源上,求1:R甲和R乙 2:甲,乙两灯的实际电压 3:甲乙两灯的发光情况
甲乙两灯分别标有"3V,3W""6V,12W"字样,将它们串联后接在9V的电源上,求
1:R甲和R乙 2:甲,乙两灯的实际电压 3:甲乙两灯的发光情况
甲乙两灯分别标有"3V,3W""6V,12W"字样,将它们串联后接在9V的电源上,求1:R甲和R乙 2:甲,乙两灯的实际电压 3:甲乙两灯的发光情况
1 R甲=U^2/P=3^2/3=3欧 R乙=U^2/P=6^2/12=3欧
2 V甲=V乙=9/2=4.5 V
3 两灯的发光亮度一样