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電子公式。. ]! L0 s1 h' h. }1 r9 s
I=Q/t3 K- P; \- e0 f6 f
I:Current(A)
- J2 f) z' z1 t6 G3 A) ^% d ]Q:Charge(c)
3 _' N/ Z4 Z: N; c5 b- Z. r7 p% _. xt:Time(sec)
) E, V2 u& E# W( U# u+ X
2 A* w1 T5 [/ i( k# N" VV=IxR% k0 _4 [2 U6 j5 H
I=Current(A)
5 G& M: D# ]. s9 ~2 ]7 E8 x- IR:Resistance(ohm)
l/ d/ X* Y' C1 H/ {! f4 ?0 T$ c& j% p9 ]# l
R=pL/A0 d( s/ a; ?) g5 b
R:Resistance(ohm)
! x+ q+ l& x/ n2 N% cp:Resistivity(ohm-m)) G% f! w5 _5 S b2 e
L:Length(m): M) T2 b# G- V3 |+ s4 I6 {0 T- w
A:Cross sectional area(m2)6 u9 y! u' S4 L1 w& l6 m v
: j3 F7 T- t& B! g
DC! a" @$ p# P6 l4 ?: _' p% u' {
P=VxI
. ?1 W. D' O8 T7 S: t or6 [- p9 J$ W, W% [9 G
P=V2xR
/ Z* g' w8 P6 d( U# Z or+ d. W. M5 L# f# G, {& v
P=I2xR7 ]8 N! r3 P, j6 A$ D5 q" {
P:Power(W)
2 O: z( y4 p# a7 ^V:Voltage(V)
2 G, i; j5 ^, P1 V& e7 A$ AI:Current(A)
; B" e+ O5 h5 f2 ER:Resistance
?' X D2 A* M' Q% U0 f x, I! _, a/ g1 N, v/ V; j0 u
AC
% l1 `8 J) l, I) ~& aP:Power(W)
7 Q+ \! |) e2 C, lV:Voltage(V)' o, {9 ~" r" e( V
I:Current(A)2 u' X6 G+ Q6 X" Y
/ _: o+ e& z1 ?$ R6 q' N& SE=(P*t)/1000- p' t0 L4 E6 M& V
E:Power(W)
4 R) m/ i- m3 p0 j0 \4 [1 o# G6 At:time(h/day)# @5 u$ p2 Z5 k9 n @* [
. r, [+ |2 h2 V9 v- \5 _" QC=Q/V
( Y9 t# ?" K$ H9 M" l$ N( rC:Capacitance(F)
( y3 t+ y5 U& J! C" _3 jQ:Charge(C)
9 k' n g: _ V8 l4 U2 NV:Voltage
1 z8 _ Q& L$ q" V- [4 n- X+ O
" D" b/ l: k P; E0 rXc=1/(2丌fc)( T+ S# W; s+ s9 A8 B) W' ~
Xc:Reactance(ohm)
0 i: L& b" |! j* Z2 p* R |C:Capacitance(F)7 T, S$ k1 ?, {3 \& m
f:Frequency(Hz)7 _8 u0 L, {! Y' }
9 u( m# e% ^, l
XL=2丌fL
, k5 m, V7 H, W! qXL:Reactance(ohm)# }/ {: t+ u% ^
L:Inductance(Hz)* V7 `* p: o5 a
f:Frequency(Hz) d/ h; ^/ V7 M) c0 M: y# W
! v7 f# o' y: l2 q
! a v, i& Z$ b& A |
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发表于 2014-12-28 23:05:18