原创力文档- 1、本文档共42页，可阅读全部内容。
- 2、原创力文档（book118）网站文档一经付费（服务费），不意味着购买了该文档的版权，仅供个人/单位学习、研究之用，不得用于商业用途，未经授权，严禁复制、发行、汇编、翻译或者网络传播等，侵权必究。
- 3、本站所有内容均由合作方或网友上传，本站不对文档的完整性、权威性及其观点立场正确性做任何保证或承诺！文档内容仅供研究参考，付费前请自行鉴别。如您付费，意味着您自己接受本站规则且自行承担风险，本站不退款、不进行额外附加服务；查看《如何避免下载的几个坑》。如果您已付费下载过本站文档，您可以点击 这里二次下载。
- 4、如文档侵犯商业秘密、侵犯著作权、侵犯人身权等，请点击“版权申诉”（推荐），也可以打举报电话：400-050-0827(电话支持时间：9:00-18:30)。
查看更多
Problem 7.1 Applying KVL to Fig. 7.1. 10/03/1999
Taking the derivative of each term,
or
Integrating,
or
Problem 7.2
where is the Thevenin equivalent at the capacitor terminals.
Problem 7.3
where
Problem 7.4
where ,
Problem 7.5
where ,
Problem 7.6 ,
+?+?+v = 1
+
?
+
?
+
v = 1
?
8 ?
1 V
0.5 V
10 ?
i2
i
i1
,
Problem 7.7
or
Problem 7.8 ,
15 ?10
15 ?
10 ?
4 ?
iT
io
i
+
v
?
10 mF
i.e. if , then
across the capacitor terminals.
By applying the current division principle,
Problem 7.10 Applying KCL to the RL circuit,
Differentiating both sides,
If the initial current is , then
,
Problem 7.11 When t 0, the switch is closed and the inductor acts like a short circuit to dc. The 4 ? resistor is short-circuited so that the resulting circuit is as shown in Fig. (a).
2 H
2 H
4 ?
(b)
3 ?
12 V
+
?
(a)
i(0-)
Since the current through an inductor cannot change abruptly,
When t 0, the voltage source is cut off and we have the RL circuit in Fig. (b).
Hence,
Problem 7.12
where is the Thevenin resistance at the terminals of the inductor.
Problem 7.13
where ,
Problem 7.14
(a) and
(b) where and
Problem 7.15 ,
0.4 HReqi(t)+
0.4 H
Req
i(t)
+
vo(t)
?
,
i1i
i1
i2
? +
i
i1
i2
1 V
i/2
10 ?
40 ?
To find we replace the inductor by a 1-V voltage source as shown above.
But and
i.e.
Problem 7.18
Let p be the fraction
i.e.
2 HRth
2 H
Rth
Vth
+
?
Problem 7.20 ,
,
Using current division, the current through the 20 ohm resistor is
10/03/1999
1 ?3 ?2 ?+
1 ?
3 ?
2 ?
+
vo(0) = 2 V
?
+
vx
?
1/3 H
The Thevenin resistance at the inductor’s terminals is
,
Problem 7.22
(a)
=
=
=
=
Problem 7.23
v(t)-1t
v(t)
-1
t
2
3
0
1
4
2
1
i(t)-1t
i(t)
-1
t
2
3
0
1
4
1
Problem 7.26
Problem 7.27
Problem 7.28
Problem 7.29
(a) ,
(b) ,
Problem 7.30
, or
, or
Problem 7.31
Before t = 0,
After t = 0,
, ,
Before t = 0, , where is due to the 12-V source and is due to the 2-A source.
To get , transform the
文档评论（0）