电路两端的交流电压为U=Umsin314t V,在t=0.005s时的值为10 V,则接在电路两端的电压表读数为A.10 V B.5V C.1.414V D.7.07V(看了简单的参考答案后,怎样求出Um,什么“有效值”,“瞬时值”,“最大值”,我完
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![电路两端的交流电压为U=Umsin314t V,在t=0.005s时的值为10 V,则接在电路两端的电压表读数为A.10 V B.5V C.1.414V D.7.07V(看了简单的参考答案后,怎样求出Um,什么“有效值”,“瞬时值”,“最大值”,我完](/uploads/image/z/8876446-70-6.jpg?t=%E7%94%B5%E8%B7%AF%E4%B8%A4%E7%AB%AF%E7%9A%84%E4%BA%A4%E6%B5%81%E7%94%B5%E5%8E%8B%E4%B8%BAU%3DUmsin314t+V%2C%E5%9C%A8t%3D0.005s%E6%97%B6%E7%9A%84%E5%80%BC%E4%B8%BA10+V%2C%E5%88%99%E6%8E%A5%E5%9C%A8%E7%94%B5%E8%B7%AF%E4%B8%A4%E7%AB%AF%E7%9A%84%E7%94%B5%E5%8E%8B%E8%A1%A8%E8%AF%BB%E6%95%B0%E4%B8%BAA.10+V+B.5V+C.1.414V+D.7.07V%28%E7%9C%8B%E4%BA%86%E7%AE%80%E5%8D%95%E7%9A%84%E5%8F%82%E8%80%83%E7%AD%94%E6%A1%88%E5%90%8E%2C%E6%80%8E%E6%A0%B7%E6%B1%82%E5%87%BAUm%2C%E4%BB%80%E4%B9%88%E2%80%9C%E6%9C%89%E6%95%88%E5%80%BC%E2%80%9D%2C%E2%80%9C%E7%9E%AC%E6%97%B6%E5%80%BC%E2%80%9D%2C%E2%80%9C%E6%9C%80%E5%A4%A7%E5%80%BC%E2%80%9D%2C%E6%88%91%E5%AE%8C)
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