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電子公式。4 i0 e' L4 ^$ f
I=Q/t
! j' X8 K0 I$ n2 AI:Current(A)
; |! w% `+ n a8 T9 WQ:Charge(c)
7 D1 o( _" f4 J" Z$ r! it:Time(sec)" L, a7 R& h/ `, p1 ~ }# n; w
8 S/ ]: ]7 n9 Y* i$ X0 t. R
V=IxR `% h% }* Z- ?. Y& D
I=Current(A)
9 b; v- m0 O4 Y2 ~& XR:Resistance(ohm)1 [. W5 [7 ~( i$ {$ m }. E
; K2 E" S' z# w: ?R=pL/A- ]* C! H0 H0 {" `! C' `
R:Resistance(ohm)
, L# u$ I; ?' p! u2 {2 C+ ip:Resistivity(ohm-m)
+ a, ]0 i. A: i8 H0 WL:Length(m): o8 [& N$ y1 z1 T
A:Cross sectional area(m2)" ^8 Q; @/ E, d! J
: s0 M0 k) H# N. Z! S$ B3 KDC
6 c7 q( [; Z6 K" F/ |P=VxI/ B* R6 C" _6 y" K. D/ m
or
1 @8 g" w: r: \, R( E' }( MP=V2xR
! x; l2 k- O9 J, i m or
9 Q9 [% ^. ~4 y+ z# G& FP=I2xR+ G- ]3 |1 Q2 @; e9 u5 r
P:Power(W)4 q4 W; J" _+ {: |
V:Voltage(V)/ h% y; A1 J: x5 F+ P& q
I:Current(A)
0 c! S- R3 ^- X. z0 G% r9 oR:Resistance
3 O0 ~7 u) r) n! }% i9 r" J4 Z! M3 k) S7 g5 E. b# ]
AC/ z7 C8 u9 j P4 J1 }# j
P:Power(W)
6 X# x4 n7 h# N8 u9 ^* N% v3 t5 XV:Voltage(V)
0 M) H5 t+ q" O* o+ y+ K8 eI:Current(A): k) w' n" O* a$ i: y8 t
. x$ r, R2 e1 A9 D" G
E=(P*t)/1000. `3 h- t: n% J. z# v& y. P3 `9 }% {
E:Power(W)
* O6 ^7 Z$ }2 ct:time(h/day)2 S3 a/ f% t' H
( b; M5 I* A, `1 D- e) z9 c& b& n6 [C=Q/V
. _6 I" }1 }' p0 |2 C0 P9 yC:Capacitance(F)
& V+ }: Q, S- d! i) eQ:Charge(C)
+ U8 x5 T" s8 ^! c" FV:Voltage
/ x8 ?! T8 O8 c1 A9 U; L. k5 N B! Q) y R3 }! ]5 Y7 s% _
Xc=1/(2丌fc)
5 w6 q5 F2 E: Z4 _4 oXc:Reactance(ohm)2 |0 g W" l1 A
C:Capacitance(F)
4 ~# O" N9 @) `6 e. N [" g* i! gf:Frequency(Hz)5 E, q8 e: m* e1 B* x3 K# f
; M! o; P# T/ T1 Z- b
XL=2丌fL
5 X A- U0 B+ p* p1 [: EXL:Reactance(ohm)! f: w2 F. T! ?8 u
L:Inductance(Hz)1 P) m9 z+ g4 o& Z: q
f:Frequency(Hz): L2 I% [; a' m" F
. a- I. M7 Y. s/ h( `; u
2 `+ [: F" J& e! w4 t |
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