• 2022-07-24
    桥式整流电路如图题[tex=2.5x1.286]ZV8nvBPJyyX9exXe9+jngg==[/tex]所示,已知变压器二次电压的有效值为[tex=4.071x1.286]RwPu2W31YNBgJWlF6E/Eb3QAWfktYHs/5+hHCiqgq0E=[/tex],负载电阻[tex=4.786x1.286]ZUJ1WqXVb+c91CvtUooEse5EQdJo5lgz7SbkUhR/KsI=[/tex].试求(1)直流输出电压[tex=1.143x1.286]aGcmwjqemzqhNbyS5Ioy7g==[/tex]的值;(2)直流输出电流[tex=1.0x1.286]dOjW15Lwrt+FNxIH7uGUjA==[/tex]的值;(3)流过二极管的平均电流[tex=1.143x1.286]OJNP8G0yK0iePgaq9fUOuA==[/tex];(4)二极管承受的最大的反向电压.[img=301x163]17b237f0e2c6efd.png[/img]
  • 解:(1)[tex=17.429x2.214]/CtSs2jiGRpNgyKtxMZd9yhcsNcQuA9gV6SDOnjtBKrbpCysf6Nr/7sO5MEHB5UAdgz/YA8idLleCPAGM/uHNqQqDSur6V8OOJ3P0z2xrqt/R2dxGBJUnvQJHkISyupb[/tex];(2)[tex=14.143x2.143]Qw7ADePXtbz1FE5Z/HktyC6eGkIJwmJIfzWQrdZSeXtkLBf2b7Gyu6Y3kPLT+BPk2zxJUb7Ks2Ju1AkGKcgeNz6MdsvcFqYfQNl65j1KEW8=[/tex];(3)[tex=12.214x2.143]S4x3T4eJkeUdaOMQsj+9cia5KkGrAQaWT/7HCSQCDlambrhy7urqSlxNE0Mw521ajI2UPr1azWtCjuSFAx0fMMgat5JAkA0+A/kcRhWAkEY=[/tex];[tex=9.429x1.286]LhH21H+9TRdlSXgdogrjCpKqI25NUKHCf2X8b74rKq4yxItQvfyK3SUEdKvibWxC[/tex].

    举一反三

    内容

    • 0

      在图[tex=5.286x1.286]yCbBycA8jWNMMExycSuPKpBYpvZqlFl5Hm7A+v2394I=[/tex]所示的[tex=0.714x1.286]atrPPistVyxj7cY8rjePCQ==[/tex]型匹配网络中,已知输出负载电阻为[tex=1.286x1.286]zL0o8/B2Q51x4BJlH0DtBA==[/tex]放大器要求的匹配阻抗为[tex=1.143x1.286]20OPfSUz+tA4Z0gFdD2gTw==[/tex].(1)若令[tex=4.786x2.143]EEM1FzREDM87v1JQwtyHkVv8hlWrRA9mkZE/qGweAeZCTS58jSWvTMur/Z0IaNyC[/tex],其值满足[tex=6.286x2.143]W4Ja3a34XTHMLDuOive72p/6ZBGeLGHvWB35eLMIe8ikDdKh6j2yJNek/9qmQtVB[/tex]的条件,试证[tex=13.214x2.357]3SYsK7rXyuYvruN+czPVWGR6kIPO2Kd9Uv0M7kWJbr92up/bOh0TgjJOZKKhANDhWQOWyNjMmV5Co9H0boygsetNWfCpnqtN7wcjPkvgwe6UyjsyeHF2aLmjRII0f0/+[/tex],[tex=9.5x2.857]NEbGWgE82qxPbjo2ZBZjaoyhf28BvJWL1VFLeW64fqoRqkIljGH31wTN76aWGlJX6Me40igZ2sBy6Sbuo2txrit9p4qLVpJLRg16emdrf88x+df7AxpTEL0kyts1j3faMmwikTh1mSryDWWPuaKwdQBB+YEKiS8xMJu2Eyvz7yA=[/tex];(2)已知[tex=4.786x1.286]ZUJ1WqXVb+c91CvtUooEse5EQdJo5lgz7SbkUhR/KsI=[/tex],[tex=3.357x1.286]GbsVXuFDdFVbmh229Xmg9w==[/tex],[tex=4.929x1.286]LhE7s0O2V8T7iutKnlWgoJDpQSaYMASswpejLjR3nQE=[/tex],[tex=4.643x1.286]soMCK0a2iUm23KBpu1oU4tQiQxLGWO9/ftqJgjBND5w=[/tex],试确定[tex=1.071x1.286]TzSjR+Mm/7PihZ9xKbt9ew==[/tex]、[tex=1.143x1.286]nI1SlHkqe9ZdsJmEgXB5Ag==[/tex]、[tex=1.071x1.286]yoUzoQNb2u5q60BRWeL21g==[/tex]值.

    • 1

      设二维离散随机变量[tex=2.5x1.357]PWg5V4GQQafckGNgbx6gmw==[/tex]的可能值为(0, 0),(−1, 1),(−1, 2),(1, 0),且取这些值的概率依次为1/6, 1/3, 1/12, 5/12,试求[tex=0.857x1.0]N7iCrOsS+NNEUUlnsYCi1g==[/tex]与[tex=0.643x1.0]O+viFNA0oHTwnBtQyi80Zw==[/tex] 各自的边际分布列.

    • 2

      一个直流应变电桥下图所示。已知:[tex=14.643x1.214]tO8UNIIIJHQPIkJjAse1snoJUNnLtt6IA5eBbarWffip3oXgNt1XshnaEfGle1Sn2gOLMEV+RwlTkRQ8ljyaEQ==[/tex]电阻应变片灵敏度[tex=2.429x1.286]DTwf63AGVyQRDyqmq5vqMQ==[/tex].求(1)当[tex=1.143x1.286]IU3kZOa7XcU8qTCS67K6rA==[/tex]为工作应变片,其余为外接电阻,[tex=1.143x1.286]IU3kZOa7XcU8qTCS67K6rA==[/tex]受力后变化[tex=6.143x1.286]2p4dYVcflicsr8QKXtl+toXKC1V1O2YXCbLue+og/G8=[/tex]时,输出电压为多少?(2)当[tex=1.143x1.286]qnCxsFsgVyiWR+u8WuOBtA==[/tex]也改为工作应变片,若[tex=1.143x1.286]qnCxsFsgVyiWR+u8WuOBtA==[/tex]的电阻变化为[tex=2.5x1.286]3bvRuuz3SEy9tBjhFKFd3Q==[/tex]时,问[tex=1.143x1.286]IU3kZOa7XcU8qTCS67K6rA==[/tex]和[tex=1.143x1.286]qnCxsFsgVyiWR+u8WuOBtA==[/tex]是否能感受同样极性的应变,为什么?[img=307x153]17d0f365e97b510.png[/img]

    • 3

      set1 = {x for x in range(10)} print(set1) 以上代码的运行结果为? A: {0, 1, 2, 3, 4, 5, 6, 7, 8, 9} B: {0, 1, 2, 3, 4, 5, 6, 7, 8, 9,10} C: {1, 2, 3, 4, 5, 6, 7, 8, 9} D: {1, 2, 3, 4, 5, 6, 7, 8, 9,10}

    • 4

      电路见图7-23,已知变压器二次边电压[tex=8.0x1.5]zw7KxW7DzVM2x1jftc5tmZA0odk59e8L6mjGiiZ7yJc=[/tex],滤波电容[tex=4.286x1.214]t5rVQcyj2SmAiQ/JD+K20A==[/tex],负载电阻[tex=3.786x1.214]HbWUuz8n7Js1Ud/KFmHwOA==[/tex],试求:  当开关S断开时,输出电压平均值,二极管所承受的最高反向电压 [img=340x152]17d08f310997425.png[/img]