Kef3 Diafan Phys Cgymn
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Φυσική Γ’ Γυμνασίου - Κεφάλαιο 3: Ηλεκτρική Ενέργεια ΚΕΦΑΛΑΙΟ 3: Ηλεκτρική Ενέργεια ( ά φ 3 1 & 3 6) (παράγραφοι 3.1&3.6) Φυσική Γ’ Γυμνασίου Φυσική Γ Γυμνασίου
description
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Transcript of Kef3 Diafan Phys Cgymn
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3:( 3 1 & 3 6)(3.1&3.6)
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:
() () () () ()
.
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..
,, .
.
(J l ) '(Joule),'
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() R I R I t;
.R ..
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() ::
(I) (R) (R)
(t) (t)
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() (Q);(Q);
(Q) ' (m) (m) () ::
Jc = 4.200k C
Q = cm m,c
(C)
kg CQ
(C)
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; t R t R
()
::
: R,t
.
I
(Q)
2I 43I 9
(Q) . .
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; t I t I
() (R)(R)
::
: ,t
R
2R 23R 3
(Q) (R)
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; R I R I
() (t)(t)
::
: ,R
t
2t 23t 3
(Q).
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(Joule):Q R , R ,I t :
I ,,
R, t t.
(J l ) 2Q I R t (Joule): QJ(Joule), ,R ,t sec
2Q I R t=
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Q R=10 R 10 =1 t=1min.
:
2 2(1 ) 10 1minQ I R t A= = =2 1 10 (60sec)
600AJ
= = 600J=
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,; ;
Oh
E V q = Ohm
V I R
qI q I t
= . I q I tt
= = 2( ) ( )E I R I t E I R t
J (), I , R t s.
2 ( ) ( )E I R I t E I R t = =
J(),I,Rts.
.=. . .
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::
,.
.
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,.
.
,, .
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,, ..
Ohm: (R) Ohm: (R)(I).
.
,.
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.
:=. .
.
. ...
.
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, ;;
E V q = Ohm
V I R
qI I
= . qI q I tt
= =
1 ( )E V I t E V I t = =
11J1s 1 V.1V.
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2Q I R t= :
( Ohm)
2E Q I R t= = :E V I t=
E Q I R t= =
2Q I R t= :
Q I R t: : E
(.. )( Ohm)E Q E E Q E= +
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:
(885)
12V, 2 2.1.000J.
.
12 2 60sec 1440E V I t V A J= = =
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..
R 2Q I R t=
E Q W= + Q I R t=
. 1440 1000 440Q E W J J J= = =
W
WaE
=0 1a
1000 0,69W Ja = = =
0,691440
aE J
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E V I t = .
: :(E) (t)(t)
EPPt
= S.I.1Watt():1Watt 1Joule1sec
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:
E V I tP P V IP t= = t P V I =
:
2 22
QQ I R tPt
= = t2
2Q
VP I RR
= =
: EP = t
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:
22
QVP I RR
= =
( Ohm)R
P P :P V I=
QP P=
:2
2Q
VP I RR
= =
: P
R
(.. )( Ohm)P P P
QP P P= +
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:
(R=3) (V=12V). (V 12V). .
.
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2 2 2( )2 2 2(12 ) 144P= 483 3
V V V WR
= = = 12= =4 3
V VI AR
= 2 2 2
3
P= (4 ) 3 16 3 48
R
I R A A W
= = =
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1 2
2 2 2
3 3 6
(12 ) 144
R R R
V V V
= + = + =
1 2(12 ) 144P = = 24 P P
6 6V V V WR
= = = + 12 26
V VI AR
= = =2 2 2
1 1
6
P = (2 ) 3 4 3 12
R
I R A A W
= = =1 1
2 2 22 2P = (2 ) 3 4 3 12I R A A W = = =
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23 3 9R R 21 21 2
3 3 9 1,53 3 6
R RRR R
= = = = + +
1 212= =4 3
V VI I AR
= = 1 2
3
P = 12 4 96 P P
R
V I V A W
= = = +
2 2 21 1P = (4 ) 3 16 3 48I R A A W = = =
2 2 22 2P = (4 ) 3 16 3 48I R A A W = = =
.
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P 48W=P 24W=P 96W=4 I A=1 2 4 I I A= = 2I A=
; ,,
; ,
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: ; ; ; ;;;
.
.
.
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. (kWh).
(1 kWh) (1kWh)1kW(1000W) .
:100W 10 1 kWh101kWh.
