为何正弦交流电电流与电压的有效值是最大值比/2

Publisher: 国家哲学社会科学学术期刊数据库

E-ISSN: 1003-6148|35|9|40-40

ISSN: 1003-6148

Source: 物理教学探讨:中学教学教研版, Vol.35, Iss.9, 2017-01, pp. : 40-40

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Abstract