作者metastable (亚稳)
看板Physics
标题[题目] RLC电路
时间Sat Jun 29 17:17:14 2013
[来源]Holliday CH31 87题 (课本习题、考古题、参考书...)
[题目]The ac generator in Fig. 31-40 supplies 120 V at 60.0 Hz. With theswitch
as in the diagram, the current leads the generator emf by 20.degree. With the
switch in position 1, the currentlags the generator emf by 10.degerr. When the
switch is inposition 2, the current amplitude is 2.00 A. What are (a) R, (b)
L,and (c) C?
图
http://ppt.cc/V09N
εm tan 10
L=----- (1-2----------) (我看不懂这是怎来的 请各位帮我解答)
wd*I2 tan(-20)
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