如图所示,电源电压不变,当开关S断开时,V1的示数为5V,V2为7V,开关闭合后,V1为9V,V2为5.4V.求:(1)开关断开时,每盏灯的电压和电源电压各是多少?(2):开关闭合后,每盏灯的电压又是多少?
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![如图所示,电源电压不变,当开关S断开时,V1的示数为5V,V2为7V,开关闭合后,V1为9V,V2为5.4V.求:(1)开关断开时,每盏灯的电压和电源电压各是多少?(2):开关闭合后,每盏灯的电压又是多少?](/uploads/image/z/6141650-50-0.jpg?t=%E5%A6%82%E5%9B%BE%E6%89%80%E7%A4%BA%2C%E7%94%B5%E6%BA%90%E7%94%B5%E5%8E%8B%E4%B8%8D%E5%8F%98%2C%E5%BD%93%E5%BC%80%E5%85%B3S%E6%96%AD%E5%BC%80%E6%97%B6%2CV1%E7%9A%84%E7%A4%BA%E6%95%B0%E4%B8%BA5V%2CV2%E4%B8%BA7V%2C%E5%BC%80%E5%85%B3%E9%97%AD%E5%90%88%E5%90%8E%2CV1%E4%B8%BA9V%2CV2%E4%B8%BA5.4V.%E6%B1%82%EF%BC%9A%EF%BC%881%EF%BC%89%E5%BC%80%E5%85%B3%E6%96%AD%E5%BC%80%E6%97%B6%2C%E6%AF%8F%E7%9B%8F%E7%81%AF%E7%9A%84%E7%94%B5%E5%8E%8B%E5%92%8C%E7%94%B5%E6%BA%90%E7%94%B5%E5%8E%8B%E5%90%84%E6%98%AF%E5%A4%9A%E5%B0%91%3F%282%29%3A%E5%BC%80%E5%85%B3%E9%97%AD%E5%90%88%E5%90%8E%2C%E6%AF%8F%E7%9B%8F%E7%81%AF%E7%9A%84%E7%94%B5%E5%8E%8B%E5%8F%88%E6%98%AF%E5%A4%9A%E5%B0%91%3F)
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