电功与电热
来源:学生作业帮 编辑:百度作业网作业帮 分类:物理作业 时间:2024/08/19 15:25:35
某电热丝有甲、乙两根电热丝,把甲、乙分别单独接到电压为U的电源上,甲通电6min,乙通电12min,可将同样一壶水烧开,问在下列情况下各需多长时间可将同样一壶水烧开? (1)两电阻丝串联后仍接在电压为U的电源上; (2)两电阻丝并联后仍接在电压为U的电源上; (3)两电阻丝并联后仍接在电压为U\2的电源上;
![电功与电热](/uploads/image/z/18215748-36-8.jpg?t=%E7%94%B5%E5%8A%9F%E4%B8%8E%E7%94%B5%E7%83%AD)
解题思路: 根据电功率和电功的计算公式计算
解题过程:
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最终答案:略
解题过程:
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最终答案:略