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電子公式。/ O0 o: c# L, y% F: h4 u
I=Q/t$ T/ M9 j* G0 u1 Z5 C/ t
I:Current(A)0 N& E) p5 @1 C6 l) V3 ?. M3 |
Q:Charge(c)
4 J6 D8 H! E' ?, |t:Time(sec)0 ?; Y* D% r* `$ C, Z
" X3 q; O. i+ _0 u5 g
V=IxR
0 c$ J; J I) k& ?I=Current(A)
) g2 R9 E+ ^( e6 t e5 ], K* rR:Resistance(ohm)
1 |1 i& t: ^- U9 [) U: ?% o9 ~+ ?* ?+ H2 L( u; p4 F- V5 p
R=pL/A
! _# E- B; N% v5 q5 C3 z2 ER:Resistance(ohm)
2 s7 g E/ E, K0 r- _9 Ip:Resistivity(ohm-m): ]% g8 n- |" E: s6 S- R, f
L:Length(m)
' T0 N- \% [6 Z5 C4 IA:Cross sectional area(m2)& _5 f e v( ^+ t0 K9 ]% P- C
9 L7 \9 F R( f T2 k+ X' \
DC! ]7 U- `' V" t6 P
P=VxI8 ^" D! y: |9 G
or
& e. I2 `) Y8 }0 Z$ ^P=V2xR
8 k+ ^: W* ?5 H# n+ { or
& X0 W/ e$ o3 B! W$ k6 M! KP=I2xR
4 m6 x' H+ T' _P:Power(W)
$ M! J/ k" l4 o! NV:Voltage(V)# @& E+ `; |, K6 F5 Z* O
I:Current(A)
" r+ w" q* w8 F7 L8 q+ _R:Resistance& Z. d2 d! M5 v8 b/ |) d
7 W6 {, E: C! P+ S; ]! X/ QAC% {3 Z" Y' _3 d& i+ O
P:Power(W)
2 X; C& z; p' S" AV:Voltage(V)
3 y; \: l& G0 @9 M1 hI:Current(A)+ V6 ?( t. L+ y! P: z1 E8 `+ b
0 d" K. D, h5 d; r( b3 hE=(P*t)/1000
, C3 M* N( p0 F/ K/ FE:Power(W)5 C' X m6 |+ X
t:time(h/day); g0 b' K! n8 t7 P" S& i) @* m
& b8 l2 D2 D7 s, I0 F tC=Q/V
4 y4 _% q! H6 ~3 x* xC:Capacitance(F)
! y; P# n" _0 l$ h* h$ _Q:Charge(C)( J, l% o" C1 C5 P
V:Voltage
: @7 m5 T3 X) a. z. k
4 Z1 N! [3 C+ O \( |7 y$ c. t1 f }Xc=1/(2丌fc)+ a y8 A# ?5 F1 H( O
Xc:Reactance(ohm): L* A8 ]# M/ v& Y% f# j0 }* C
C:Capacitance(F)$ k0 }7 D% v7 n* w; z
f:Frequency(Hz)3 v2 d, s1 y; ^/ t# j+ I, Q
z& E6 \8 ^1 `+ h8 i) i& N2 u# J
XL=2丌fL
) ~! w( ?5 r+ I+ y3 t2 N: v; WXL:Reactance(ohm)3 G- M& ~" p7 m7 U
L:Inductance(Hz)
% Q0 \/ @8 U" K9 y ]f:Frequency(Hz)
% [* V, A* d+ ~: n5 J9 G( z, ~
/ F$ b1 g0 i1 u2 R/ d* F# }6 N! z' L. f, [6 i* Q. N
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发表于 2014-12-28 23:05:18