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单选题 图示耦合电感并联电路中,若L=M,则电路的等效(复)阻抗Zab为( ). 
A. 
B. 
C. 
D. 
学科：默认课程
时间：2025-11-23 01:09:12
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理想变压器是一种( )A. 储能元件B. 有源元件C. 有损元件D. 无损元件
题目2单选题
正弦稳态电路如图所示,电源<img src="https://tihai-oss-cloud.itihey.com/img/07539982ab3ec796db801d56cba9f6db.png">的角频率<img src="https://tihai-oss-cloud.itihey.com/img/a367a87ccea68a55fa53b8db1906bdd2.png">, 使正弦电压<img src="https://tihai-oss-cloud.itihey.com/img/5ec85cad2eacf807a16808e1c525a916.png">的有效值为最大,则电容C应为( )F. <img src="https://tihai-oss-cloud.itihey.com/img/b83884b8ca7b3bf625213cee949db7f3.png">A. 0.005B. 0.01C. 0.05D. 2
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电路如图所示.已知M = 0.05 H,则电路的谐振频率f0 =( )<img src="https://tihai-oss-cloud.itihey.com/img/391723b03f8437d669065d4929af0d4c.png">. <img src="https://tihai-oss-cloud.itihey.com/img/40e859258d3faa4dc18566b0c4fbfba8.png">A. 6.5B. 7.5C. 4.5D. 5.5
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题目5单选题
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