Φυσική Γενικής Παιδείας Β' Λυκείου - 3
22
ÊåöÜëáéï 3 ï Çëåêôñïìáãíçôéóìüò Ο µαθητής που έχει µελετήσει το 3ο κεφάλαιο, πρέπει να είναι σε θέση: [ Να περιγράφει το µαγνητικό πεδίο γύρω από ευθύγραµµο αγωγό απ- είρου µήκους και να υπολογίζει το µέτρο της έντασης του µαγνητικού πεδίου σε κάποιο σηµείο του καθώς και να βρίσκει την κατεύθυνσή της. [ Να περιγράφει το µαγνητικό πεδίο γύρω από κυκλικό αγωγό και να υπολογίζει το µέτρο της έντασης του µαγνητικού πεδίου στο κέντρο του καθώς και να βρίσκει την κατεύθυνσή της. [ Να γνωρίζει ότι στο εσωτερικό του σωληνοειδούς το µαγνητικό πεδίο είναι οµογενές, να βρίσκει την κατεύθυνση του και έχει κατά νου ότι η ένταση του πεδίου στα άκρα του είναι το µισό της έντασης που επικρατει στο κέντρο του. [ Να ορίζει τη µαγνητική διαπερατότητα και να γνωρίζει τι τιµές πέρνει ανάλογα µε το υλικό. [ Να υπολογίζει το µέτρο και την κατεύθυνση της δύναµης Laplace, δύ- ναµη που ασκεί οµογενές µαγνητικό πεδίο σε ευθύγραµµο αγωγό. [ Να ορίζει την ένταση του µαγνητικού πεδίου και τη µονάδα της. [ Να ορίζει την µαγνητική ροή και την µονάδα της καθώς και να γνωρίζει πότε πέρνει τη µέγιστη και την ελάχιστη τιµής της, όταν διέρχεται από επιφάνεια που βρίσκεται σε οµογενές µαγνητικό πεδίο. [ Να γνωρίζει το φαινόµενο της επαγωγής και να διατυπώνει τον νόµο του Faraday. [ Να διατυπώνει τον κανόνα του Lenz και να σχεδιάζει τη φορά του επαγωγικού ρεύµατος σε ένα κύκλωµα. [ Να διατυπώνει και να αποδεικνύει τον νόµο του Neumann για το επα- γωγικό φορτίο.
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Transcript of Φυσική Γενικής Παιδείας Β' Λυκείου - 3
-
3
3 ,
:
-
.
.
,
.
.
Laplace, - .
.
,
.
Faraday.
Lenz .
Neumann - .
-
92. -
H
3
, ,
:
70 2
K 104
= =
-
2 K
r= 0
B 2 r
=
-
.
0 K 4 n n= =
n N / = .
0B n= , = /2
-
0
2 r
=
2
Kr
=
0K / 4= (), 7 20 4 10 /
=
=
0
=
Laplace
F I B= Laplace Laplace ( ).
S=
S.I. 1Wb (Weber) 21Wb 1T m=
N
t= Faraday
I NR Rt
= =
q t N
R= = Neumann
LL
FF B B
= =
.
.
1 (esla) 1 1 / m=
Laplace
( LF ).
-
-
93. 1
1
1:
.
.
..
.
.
.
E Q tI R
Q R t RE R t
t
= =
= = =
=
2:
Lenz .
. -
-
. -
.
.
N
B
S I
S
N
-
94.94. 2
"" 1
2
.
: 1 . 149, 2 . 151, 3 . 154, 6 . 167,
7 . 170, 8 . 175
: . 182 (6), . 183 (34 - 36), . 184 (37 - 41),
. 185 (42 - 44), . 186 (49), . 187 (50 - 55),
. 188 (59 - 63), . 189 (64, 65, 67, 68)
: . 191 (5, 6, 8, 9), . 192 (16), . 193 (20, 23, 25),
. 194 (29, 30), . 196 (46, 49, 50), . 197 (51)
.
5:
.. 3.2,3.6,3.7,3.8,3.9,3.10,
: . 133 - 136 (1 - 13)
: 3.1,3.3, 3.4, 3.13, 3.21, 3.22
.
.
: 2, 3, 5, 6
: 9.6, 9.7, 9.8, 9.11
: 9.19, 9.21, 9.24
-
95.95. 2
.
: 2, 4
: 10.6, 10.7, 10.8
: 10.9, 10.11, 10.12, 10.16
.
: 2, 3, 4, 5
: 11.2, 11.3, 11.4, 11.5, 11.10, 11.11
: 11.16, 11.17, 11.19, 11.20
. Laplace
: 3, 4, 5
: 12.2, 12.3, 12.6, 12.18
: 12.23, 12.26, 12.27
.
: 3, 4, 5, 6, 9, 12
: 13.5, 13.6, 13.7, 13.10
: 13.26, 13.28, 13.30, 13.34, 13.35
-
96.96. 3
1
2
3
1. 1I = 10A - .
. 2 = 15/
.
r = 10 cm.
. -
,
.
:
. 7 511 22I 2 1010 2 10 Tr 10 10
= = =
7 522 2
2 I 2 15/10 3 10 Tr 10 10
= = =
5 5 52 1 3 10 T 2 10 T 1 10 T
= = = -
.
. -
-
,
,
,
.
3 5 23
3 733
2 B r 1 10 10 10I 52r 2 K 2 10
r
=
= = = = =
3I
1I .
I1
I2
B3 B
I3
()
K
I1
I2
KrB1
B2B
()
-
97.97. 3
2. ,
d = 20 cm.
. ,
1I 10A= 2I = 20A ,
.
. -
,
;
. -
(), -
;
:
. 7 511 22 I 2 1010 2 10 Td 10 102
= = =
7 522 2
2 I 2 2010 4 10 Td 10 102
= = =
5 5 5M 1 2 2 10 T 4 10 T 6 10 T
= + = + = -
.
. 51 2 10 T
= 5
2 4 10 T
=
5 5 5M 2 1 4 10 T 2 10 T 2 10 T
= = =
.
. : 1 2 = 1 22 2x d x =
10 20 2020 x 2x 20 3x x cmx 20 x 3= = = =
.
3. -
= 10 cm. -
d
d/2M
B2B1
BM
I1 I2
d
d/2M
BM
B2B1
I1 I2
d
xN
B2B1
I1 I2
-
98.98. 3
ER 50= .
CR 20= . - = 30V r = 5.
:
. ;
.
,
;
.
90,
; 7 2 2
NK 10 10A
=
:
.30V I 0,4A
R 75
= = =
.
cB
-
EB
7
K C E 2B B B , 810
= + = =
7 7c C
2 2 0,4B K 10 8 100,1
= = =
C EB B C E K C EB B B B > =
7 7 7KB 8 10 8 10 17,12 10
= = CB .
. CB , KB , CB 90, C EB B
2 2 14 14 7C E K KB B 640 10 64 10 T B 704 10 T.
= + = + =
4. 40cm=
R 10= . N = 500.
R = 8 -
= 20V
r = 2. :
A B
+
E,r
A B
+
E,r
I
I
BC
BE
-
99.99. 3
. .
. , ,
Rx
R,
;
.
, = 500, -
; 7 2
NK 10A
=
:
. E E 20I A 1A
R R R r 20 = = = =
+ +
7 41
500B K 4 10 4 1 5 104 10
= = =
.
, ' 2
= -. = '
2 =
x x
x x
1 20 ' R 12 40 R 40 12 28
R R r 2 R 12= = + = = =
+ + +
. 4 21B 500 500 5 10 25 10 ,
= = = =
5. = 1000 , L = 1m,
4 2S 10 m= -
= 25. :
. -
.
. ,
.
.
,
1/100 -
. 7 2
NK 10A
=
RX
E,r
I
R
R
E,r
I
R
-
100.100. 3
:
. 3
7 10B 4 I 10 4 25L 1 100
= = =
. 2 4 6 S 10 10 Wb 10 Wb
= = =
. 2c
2 2 3
1 2B B K 10 K 4 I100 r L
L 1r m r 5cm
210 N 210 10
= =
= = =
6. = 4 ,
20cm= R1= 0,5.
t0
= 0sec t = 6sec
. :
.
.
.
.
. .
( )7 2k 10 =:
. : R = R
1 = 4 0,5 = 2
E
16 4 12 4 V 4 V 8V
t 6 0 6
8VI 4R 2
= = = =
= = =
.
2E
q I t 4 6C 24CW I R t 16 2 6J 192J= = =
= = =
. r 202r r cm 10cm
2 2= = = =
.
7 6 1
2 2 4B 4 10 T B 32 10 Tr 10
= = =
6(0,0)
16
4
t(s)
(Wb)
-
101. 4
1
2
3
4
1.
20V
2, 4 -
0,2 m 1000 .
34 10 .. :
. .
. R.
. R.
. (500 )
.
-
. 7 2
Nk 10A
= ( 1999)
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R R
E,r
-
102. 4
2. . -
R1
60 -
R = 20.
L = 1m 1000 .
R2 -
10 = 120V
r = 5. :
. -
.
. .
. R1.
.
.
: 7 2
Nk 10A
= ( 2000)
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R2
AE,r B
R
R1
-
103. 4
3.
r = 0,02 m 1R 5= , -
2R 15= .
3R 40= . , V.
4B 10 = .
9 2 2k 9 10 m /C= , 7 2Nk 10A
=
. .
. V.
. .
. R2,
; ( 2001)
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B
R1R2
A
V
R3
-
104. 4
4.
L = 0,2 m, 7 2S 4 10 m ,= 4m 8 10 kg= ,
R = 0,05
,
.
-
, B
-
.
1R 8,95= = 10V
r = 1.
7C 10 F= . ,
. ( 2g 10m / s= ).. .
. .
. .
.
. .
( 2002)
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+
RA
C
B
I
R1
E,r
-
105. 4
5.
-
-
,
= t. -
r = 3cm, R1 = 2, R
2 = 3, R
3 = 6
= 103/3, :
. To
. -
.
. R2
R3 t = 1min. (
2 10 )
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Br
R1R2
R3
-
106.106. 5 1
1
1.
:
. . . . .
( 5)
2. Tesla :
. .
. . .
( 5)
3. -
:
. .
. . o45 ( 5)
4. Laplace -
:
.
.
.
.
( 5)
5. , ,
, :
. ,
.
. -
.
. Laplace
.
1
2
3
4
5
-
107.107. 51
. 1.
. -
.
. . .
. .
( 5)
2
1. , ,
.
.
.
:
. / . 2/ . /2
( 2)
.
( 6)
2. L -
. -
.
;
. -
.
. L
.
( 3)
( 5)
3.
-
, .
Laplace
:
i. ii.
( 2)
.
( 7)
I
-
108.108. 5 1
r
r1
I1
(A)
I2
( )
3
() () -
1I 10A= 2I 30A= .
2r 8 10 m= . ()
21r 2 10 m
= :
. -
.
( 9)
.
.
( 7)
. ()
-
.
7
2NK 10A
=
( 9)
4
L = 1m m = 100g -
= 1
.
E = 5V r = 1,
R.
. .
( 6)
. R.
( 7)
. R -
1R 1= .( 6)
i. ;
ii. .
( 6)
R
K
E,r
I
B
-
109.109. 52
1
1. r -
, ,
. 2r , -
:
. . 2 . /2 . /4
( 5)
2. -
, , -
:
. .
. . .
( 5)
3.
:
1. A. B (Tesla)
2. B. I (A)
3. Laplace . Q (C)
4. . (Wb)
5. E. LF (N)
1. 2. 3.
4. 5.
4.
:
. Lenz.
. Lenz .
.
.
.
, .
( 5)
-
110.110. 5 2
5. , -
, :
.
.
.
. , -
( 5)
2o
1.
. , -
.
. (-
), :
. .
( 2)
( 2)
. ,
:
. .
( 2)
( 2)
2.
t,
:
-
;
. .
( 2)
-
111.111. 52
.
( 6)
3. (1) (2)
.
1I (1), .
(2),
(1), :
. ; . ;
. ;
( 2)
.
( 7)
3
1. R = 2
,
.
.
.
( 7)
.
-
.
( 7)
.
t =2s t = 3s;
( 11)
t
t(I)t
2
t(II)
I1
(1)
I2
(2)
t (s)
(Wb)
(0,0)
30
1 2 3
20
-
112.112. 5 2
4
1. = 1000 , = 100 cm,
1R 0,002= 2 2S 2 10 m= .
,
, .
. 1V 20Volt= , :. .
( 6)
. .
( 6)
.
, = 10 cm 2R 0,04= . -
. 7 2 2NK 10 10A
= ,
. t 0,1sec= -
, ;
( 4)
. .
( 4)
. ;
( 5)
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