?? P ( Power ) ?? ??? W = J / sec

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?? P ( Power ) ?? ??? W J /
sec ?????????????(?????? ??)? ???????????????? ???
?????(?????)???? ??????? Joule's law 1???I (A)
?????? E(V) ?????? ??(?????) P (W) ?? P E I
E I R ?????? P R I 2 ( P ??(W) E
??(V) I ??(A) R ??(O) ) t
???????????????? P t (J)
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????? ( ????????? photoconductive effect )
CdS, CdSe ?????????????? ????? (???????) ????
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???? CdS?? ????? ????????(??)??? ???????
CdS ???????? ????????????????? ??????????????????
??? ?????????????????? ??????
??????PN???????? ????????????????? ????????? CdS?
????????????????
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• ?????
• ?????
• ????????????
• ????????????
• ??????????
• ?????????????
• ?????
• ???????????????????????
• ????????????????????
• ???????????????

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??? ????????????????? ?????? R (O) ????? ?? P E
I EｷE / R ( ?????? E I R ) R
EｷE / P 200ｷ200 / 800 50 (O) 100 V ?
??????????? 100 V ?????? ?? P EｷE / R 100ｷ100
/ 50 200 (W) 100 V ????? ?? ??? ????????
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?????????? ???
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????????????? ( effective value )
??? ???????????? (???????????) ???????????????? ?
????????????????????? ???? (????) ? 100V
????????? ????????????141 V ????
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??????????
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??????????? ????????????????
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f ??? tanf Ec / ER f tan -1 ( Ec / ER )
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LCR ???? (??????) ???????(???)L
(H)? ???????(?????)C (F)? ??????(??)R (O)
? ??????????? ?????? (?? E ) ???????????????????
????????? (?????????)? ??????????????????
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?????? E (??? f , ????2pf) ? ????? L?C?R
???????????????? I ? ??????? ( I I L I C I
R ) ?? ?????????? E L ? E C ? E R ? ???????
E L ? ???? I XL I ?L ???????p/2(90ｰ)?????? E C
? ???? I Xc I /?C ???????p/2(90ｰ)?????? E R ?
???? I R ??????????
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• ???????????????????
• ????(???????)? C (F) ????????
• ???? I ???????????????Q??????
• ????1??????????????
• I dQ /dt
• ???????????? E (V) ? ?? I (A) ?????
• Q CE ??? I C dE/dt

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??????????????????????????????? ?????????
?????????????????????? ??????(???? x ??)??Em
Im /?C ??? ????????????????(???????)XC ?? XC1/?C
(?? O)? ??? ???????? ???? ????C???????XC????? (???
??????????????) reactance ??? ???? ????.
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???????(???)?????????????? ??????? L (H) ? ????
(n ??????? L ???)? ???? I (A)????????????? E(V)
?? E L d I / dt I Im sin (?t) ??????? E
Im ?L cos(?t) Im ?L sin (?t p/2)
Em cos(?t) Em sin (?t p/2) ( Em
Im ?L )
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??????????????????????????????? ??????????????????
????????????? ??????????????????????? ??????(???
? x ??)??Em Im?L ??? ??????????????(???????)XL
?? XL?L (?? O)? ??? ???????? ???? ??????(???? L
????) ???XL?????
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???????????????? ??? R (O) ? ???????? I
(A)?????? ?????? E(V) ?????????? E I R I
Im sin (?t) ??????? E Im R sin(?t)
Em sin (?t) ( Em Im R
) ?????????????????????? ???????????????????? ??
?????????(??????) R (O)?????
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?????????????? ??? ?????? R (O)?? ?????? ????????
XC (O)?? ???? ???????? XL (O)? ? ????? ????
????????????? ?????(?????)????????? ?????
?????? (???? scalar ?????????) (???? vector
???????)
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