一个白炽灯泡L上标有“4v 4w”的字样,将它与一个定值电阻R串联后接入电源电压恒定为6V的电路中当开关闭合后测得R消耗的功率为2W,此时灯泡未正常发光,不计温度对灯泡阻值的影响,求R的电
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/06 06:27:22
![一个白炽灯泡L上标有“4v 4w”的字样,将它与一个定值电阻R串联后接入电源电压恒定为6V的电路中当开关闭合后测得R消耗的功率为2W,此时灯泡未正常发光,不计温度对灯泡阻值的影响,求R的电](/uploads/image/z/4597266-66-6.jpg?t=%E4%B8%80%E4%B8%AA%E7%99%BD%E7%82%BD%E7%81%AF%E6%B3%A1L%E4%B8%8A%E6%A0%87%E6%9C%89%E2%80%9C4v+4w%E2%80%9D%E7%9A%84%E5%AD%97%E6%A0%B7%2C%E5%B0%86%E5%AE%83%E4%B8%8E%E4%B8%80%E4%B8%AA%E5%AE%9A%E5%80%BC%E7%94%B5%E9%98%BBR%E4%B8%B2%E8%81%94%E5%90%8E%E6%8E%A5%E5%85%A5%E7%94%B5%E6%BA%90%E7%94%B5%E5%8E%8B%E6%81%92%E5%AE%9A%E4%B8%BA6V%E7%9A%84%E7%94%B5%E8%B7%AF%E4%B8%AD%E5%BD%93%E5%BC%80%E5%85%B3%E9%97%AD%E5%90%88%E5%90%8E%E6%B5%8B%E5%BE%97R%E6%B6%88%E8%80%97%E7%9A%84%E5%8A%9F%E7%8E%87%E4%B8%BA2W%2C%E6%AD%A4%E6%97%B6%E7%81%AF%E6%B3%A1%E6%9C%AA%E6%AD%A3%E5%B8%B8%E5%8F%91%E5%85%89%2C%E4%B8%8D%E8%AE%A1%E6%B8%A9%E5%BA%A6%E5%AF%B9%E7%81%AF%E6%B3%A1%E9%98%BB%E5%80%BC%E7%9A%84%E5%BD%B1%E5%93%8D%2C%E6%B1%82R%E7%9A%84%E7%94%B5)
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