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单选题图示电路的时间常数为( ).

A.

B. 1s

C. 1.5s

D. 2s

2025春季电气23电路72学时课程封面

学科：2025春季电气23电路72学时

时间：2025-06-05 13:20:20

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图示电路中,电路原已稳定,开关K闭合后电感电流的稳态值<img src="https://tihai-oss-cloud.itihey.com/img/c1c36ecdb744e46034c6e09e3c705e94.png">为( ).<img src="https://tihai-oss-cloud.itihey.com/img/1e9901a271a7d8be12a4011f9d5741e7.png">

A. 3.5AB. 1AC. 1.5AD. 2A

已知一阶RC电路的响应<img src="https://tihai-oss-cloud.itihey.com/img/1d22bbb1aa20b94e440db63415bafea4.png">,则电容初值电压增至6V时,<img src="https://tihai-oss-cloud.itihey.com/img/e86f19dbdf3fe2da8de1a644b0f04639.png">在<img src="https://tihai-oss-cloud.itihey.com/img/002bb9582f81d481b5038ea3c68e0052.png">为( )V

A. <img src="https://tihai-oss-cloud.itihey.com/img/83bd2d25dfae512006a9cb41a0178fe0.png">B. <img src="https://tihai-oss-cloud.itihey.com/img/2df1c60d5a7116cb0db2a07e2342e33e.png">C. <img src="https://tihai-oss-cloud.itihey.com/img/3e308e69d119d5a71a1928b2257d0d64.png">D. <img src="https://tihai-oss-cloud.itihey.com/img/49b30debe8e724594dfff9051e3e6e65.png">

图示电路的时间常数为( ).<img src="https://tihai-oss-cloud.itihey.com/img/7810b998df1f1ccf25f5bf42d24c3ec7.png">

A. <img src="https://tihai-oss-cloud.itihey.com/img/9c1fa4cc02c7807aa38428d40da553b5.png">B. 1sC. 1.5sD. 2s

图示电路中电容电压的初值<img src="https://tihai-oss-cloud.itihey.com/img/10a7d9692b19bfa69059b3a655792539.png">为( ).<img src="https://tihai-oss-cloud.itihey.com/img/dbe052b309a46ce2f3b72364dd75ba35.png">

A. 6VB. 12VC. 8VD. 4V

图(a)示电路,已知<img src="https://tihai-oss-cloud.itihey.com/img/002bb9582f81d481b5038ea3c68e0052.png">时的全响应为<img src="https://tihai-oss-cloud.itihey.com/img/24b4b2d81dd5cda685532a9034b7b734.png">,含独立源电阻电路N的等效电压源电路如图(b)所示,则( ).<img src="https://tihai-oss-cloud.itihey.com/img/30d9b4a6b8a28f083fdd1d91cb562419.png"><img src="https://tihai-oss-cloud.itihey.com/img/91dce6ff465618683240597a51d824ec.png">

A. <img src="https://tihai-oss-cloud.itihey.com/img/0f3a579fcac5eb89b711b5a5f80c53a3.png">B. <img src="https://tihai-oss-cloud.itihey.com/img/4f687ddc05da4a808468e1af3df2810e.png">C. <img src="https://tihai-oss-cloud.itihey.com/img/6135a129b861a1b6f5ea2a5de493f084.png">D. <img src="https://tihai-oss-cloud.itihey.com/img/1aabfde85cc52b437d0f2794f331c0dd.png">

图示电路的时间常数<img src="https://tihai-oss-cloud.itihey.com/img/37df0f354a9642919d27445d2778ee01.png">为( )s.<img src="https://tihai-oss-cloud.itihey.com/img/91103d66c1f0094a65044f7e5e1b1721.png">

A. 0.2B. 2.5C. 10D. 0.1

图示电路原已稳定,<img src="https://tihai-oss-cloud.itihey.com/img/3949b8e8ef2fea004a18d94c8707e3af.png">时开关S打开,则下列选项正确的是( ).<img src="https://tihai-oss-cloud.itihey.com/img/80787b077aa1b7e8c4e5b2f10874ec92.png">

A. <img src="https://tihai-oss-cloud.itihey.com/img/b90b9b9ca163739b0b0af90bc0175eab.png">,<img src="https://tihai-oss-cloud.itihey.com/img/d256e755aca77dfa948127be3bd6c0d8.png">B. <img src="https://tihai-oss-cloud.itihey.com/img/c87e773dda9b75271269ab890319e8fc.png">,<img src="https://tihai-oss-cloud.itihey.com/img/2d8b1e778fd933d5814dddf3743ee43b.png">C. <img src="https://tihai-oss-cloud.itihey.com/img/db4d3cff9a851fcfda99aa1591c89482.png">,<img src="https://tihai-oss-cloud.itihey.com/img/d256e755aca77dfa948127be3bd6c0d8.png">D. <img src="https://tihai-oss-cloud.itihey.com/img/5641264e3776b40f5856c6bacd1a7ad0.png">,<img src="https://tihai-oss-cloud.itihey.com/img/46f9026a01fbd04a7c8ba14c2110ce9e.png">

两个一阶RC零输入响应电路,下列说法正确的是( )

A. 以上选项都不对B. 如果<img src="https://tihai-oss-cloud.itihey.com/img/b236c3070bf044ce9cb6db5af743e77c.png">,初始电压不同,那么它们的电压衰减到各自电压同一百分比值所需的时间必然是<img src="https://tihai-oss-cloud.itihey.com/img/4c423d6448b88f07ecf0e7029d781863.png">C. 如果<img src="https://tihai-oss-cloud.itihey.com/img/739ed0db1862a0ee3091c5d2d193ed0a.png">,初始电压不同,衰减到同一电压值所需的时间必然是<img src="https://tihai-oss-cloud.itihey.com/img/6021d49ef07c4e82c0508b266d91c086.png">D. 如果<img src="https://tihai-oss-cloud.itihey.com/img/b236c3070bf044ce9cb6db5af743e77c.png">,初始电压不同,那么它们的电压衰减到同一电压值时所需的时间必然是<img src="https://tihai-oss-cloud.itihey.com/img/4c423d6448b88f07ecf0e7029d781863.png">

电路如图所示,若<img src="https://tihai-oss-cloud.itihey.com/img/acd721d2d82c7fdda2ef4a27e95d5f31.png">,则<img src="https://tihai-oss-cloud.itihey.com/img/002bb9582f81d481b5038ea3c68e0052.png">时,<img src="https://tihai-oss-cloud.itihey.com/img/fa261edd3138ebb57e5dcb399b5a66ca.png">等于( )A.<img src="https://tihai-oss-cloud.itihey.com/img/9dfcf2aa424cf90054b6de29180c7301.png">

A. <img src="https://tihai-oss-cloud.itihey.com/img/469de96bccd14df71b32d8526ec25b86.png">B. <img src="https://tihai-oss-cloud.itihey.com/img/b696ddab2babd3aa3aba7f90142075b5.png">C. <img src="https://tihai-oss-cloud.itihey.com/img/3aeea310bde81be39d24861b1f67a2e4.png">D. <img src="https://tihai-oss-cloud.itihey.com/img/1c5050398bab7422517e389d6ea7f584.png">

电路的一阶零输入响应分量为<img src="https://tihai-oss-cloud.itihey.com/img/28a1d60a06c7b8b2de43293e626af1ed.png">,零状态响应分量为<img src="https://tihai-oss-cloud.itihey.com/img/f46814055ed9933fb8845e4d06d46c34.png">.当激励电源电压变为原值的3倍时,全响应<img src="https://tihai-oss-cloud.itihey.com/img/5932b7666b9bfbb6a48fbe09c1866d79.png">为( )

A. <img src="https://tihai-oss-cloud.itihey.com/img/a79e467862ef8b0f9ba1143be8604496.png">B. <img src="https://tihai-oss-cloud.itihey.com/img/a5b09bb4b24f1b25a9f877362570efcd.png">C. <img src="https://tihai-oss-cloud.itihey.com/img/80e4e55f95fb7bc152c091761176ce74.png">D. <img src="https://tihai-oss-cloud.itihey.com/img/87c0a549f26c558580598ae1299ed9d3.png">

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