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電子公式。, P! _; w# b, g% t: L) J3 p
I=Q/t- w* |# F* D4 ]: F
I:Current(A)3 z# o0 C8 Z& e* t. w2 f4 H
Q:Charge(c)( p3 m4 |: Q" \8 |8 J. b( U( A1 \ E
t:Time(sec)3 {) O5 J- i% d k2 I
2 D+ m* I J7 H4 {" s6 s; ^V=IxR0 z+ I% i6 t# e, x
I=Current(A)" ]7 \, ~; f: m1 l* P$ E3 @2 n; u" v
R:Resistance(ohm)
- j' h/ A# q% x9 m, p8 I, Y& A C( f3 N
R=pL/A w# ~3 C4 U0 f) J8 p
R:Resistance(ohm)
& T9 z7 f* g) [' X) Ip:Resistivity(ohm-m)$ u( k2 g( p& b+ w$ J. F6 c. U
L:Length(m)! M& }9 m% m& F! @0 o/ L! x
A:Cross sectional area(m2)1 Y) z! X/ A# F
5 j7 k; H; c. z6 A+ P2 d" Y
DC
* b& \$ O' l+ e6 p `P=VxI
( y/ ~& ~$ j- V2 f% x or, O4 `0 f" g! E; b4 f+ |' A) I
P=V2xR. T) Q0 m( g+ y: E
or8 x- w8 m" H. i& |. g7 c
P=I2xR9 l/ w2 D) H9 i0 c
P:Power(W)
5 p, {) P5 |# O+ `V:Voltage(V)0 i2 S) C5 Z6 {* {8 z2 V, @9 D8 R, p
I:Current(A)
' j4 v+ w! @( r: [* C, K0 sR:Resistance5 P8 V" n# T O, Z$ F
7 b; T" T# k3 s& c; C: n
AC
0 N( T1 e# F# K2 ~# e4 L! CP:Power(W)/ l7 A2 \& L9 N) O9 f- J3 q1 U
V:Voltage(V)
4 P" F4 j) ?+ s3 S5 NI:Current(A)
9 i/ R9 H: H4 e; k1 @; D3 F% q. g4 X1 m# \* E" g5 a
E=(P*t)/1000' Z+ _6 d4 n0 Q! [5 }9 C
E:Power(W)9 X {/ p- |; ?% L
t:time(h/day)" ?) @ ~$ e0 ^/ W1 ]
( b: ]4 S4 i! `) L" iC=Q/V) v; `- z+ e+ o- | H% l- |5 a
C:Capacitance(F)
9 o: T7 `" I' z0 ^8 J/ JQ:Charge(C)
. f+ s5 K6 f8 e& j- q( WV:Voltage
$ w3 k$ V, I' f# M; F9 |5 P
* l; ~! | w- `+ g2 G) rXc=1/(2丌fc)
- @$ g1 C/ {6 @5 ^6 |Xc:Reactance(ohm) G/ L' g. N1 M4 Q3 v$ l
C:Capacitance(F)
3 y+ Q5 F) r6 @- E% D; j$ Hf:Frequency(Hz)
6 H6 h: l" z- n. }9 A# r/ y$ J5 p, f; L6 l2 K! {
XL=2丌fL7 T- q; e/ V5 w" L, d& u
XL:Reactance(ohm)9 R5 b% ]4 N0 K
L:Inductance(Hz)
0 f% _3 @% v# w/ Pf:Frequency(Hz)( l6 n1 x. R% z5 l/ g$ q0 h
- B& g! T+ N& n$ f; K( Y9 `
/ V5 ?5 X7 t& `# i5 d |