, (3)
R1 , .
,
(2) (3) :
.
I1 R1 (1), : U1 = 1,0345,5 = 46,9 .
I2 : .
,
.
13. R = 20 Δt = 2 I0 = 0 I2 = 6 . Q, .
. - Q = I2 R t (I = const). ,
dQ = I2 R dt. (1)
I .
I = k t + I0, (2)
k - , , . .
.
(2) (1)
dQ = k2 R t2 dt. (3)
, Δt, (3) t1 t2:
.
Q, , t 1 = 1 , t2 =2 ,
.
14. , (. 9). R 1 = 100 , R 2 = 50 , R 3 = 20 , ... ε1 = 2 . I 3 = 50 , , . ... ε2 . .
. .
. , , , . . å Ii= 0.
. ..., .
, ( , ...). , .
1. : ) ( ) ; ) .
2. , , ; , , . , , , .
3. , : ) (.. IR) , ; IR ; ) ... , , .. ; ... .
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, , , . . , , . , , , , , .
.
, . 9, .
F
I1 I2 I3 = 0. (1)
DF:
-I1R1 I2R2 = -ε1,
-1
I1 R1 + I2 R2 = ε1. (2)
AFGHA:
I1 R1 + I3 R3 = ε2. (3)
(1), (2) (3) :
I1 I2 = 0,05;
50 I1 + 25 I2 = 1;
100 I1 + 0,0520 = ε2.
, - , :
I1 I2 = 0,05; 50 I1 + 25 I2 = 1; 100 I1 - ε2 = -1.
, ε2 , .
Δ :
.
Δε2:
.
Δε2 Δ, ... ε2:
ε2 = -300/(-75) = 4 .
3.2. .
1. m = 1 , . l = 10 . , α = 60 ? (. 79 .)
2. q1 = 100 q2 = 60 d = 10 . F, q3 = 1, r1 = 12 q1 r2 = 10 q2. (. 51 )
3. τ = 1,5 /. d = 12 q = 0,2 . . (. 2,26 )
4. . τ , d = 0,5 E = 2 /. (. 5,55 /)
5. , , σ = 2 /2? (. 0,23 /2)
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6. U , v = 8 /? (. 182 )
7. σ = 10 /2. , , d = 10 . (. 56,6 )
8. v0 = 3 / = 150 /. . : 1) , ; 2) , ; 3) t = 0,1 . (. 24 ; 26,4 /2; 4 /)
9. ... ε = 300 1 = 2 2 = 3 . q U : 1) ; 2) . (. 1) 0,36 ; 189 ; 120 ; 2) 0,6 ; 0,9 ; 300 )
10. 1 = 600 U = 1,6 . , 2 = 400 . W, , , ? (. 0,3 )
11. l = 5 U = 1 . j . (. 1,18107 /)
12. R 1 = 5 , . U 1 = 10 . R 1 R 2 = 12 , U 2 = 12 . ... . . (. 14 ; 2 .)
13. , R = 3 U1 = 2 U 2 = 4 t = 20 . (. 20 )
14. I , ... ε1 = 1,6 ε2 = 1,2 r 1 = 0,6 r 2 = 0,4 , . (. 0.4 )
15. ... ε1 = 8 , ε2 = 3 ε3 = 4 r = 2 . , , . (. 1,5 ; 1 ; 0,5 )
16. U R ( 10), ε1 = 5 , r 1 = 1 , ε2 = 3 , r 2 = 0,6 , R = 3 . (. 3,3 )
17. R 1 = 2 , R2 = R3 = 4 R4 = 2 , , . 11, ε1 = 10 , ε2 = 4 . . (. 6 ; 0; 4 ; 4 B)
3.3.
1. , ,.D (. ). q 3 ?
:
1. . 2. . 3. . 4. D.
2. 2,0 , 2×10-6 , . , 5 1,2×10-7.?
:
1. 11×10-3 . 2. 23×10-3 . 3. 0,65×10-2 . 4. 20×10-3 . 5. 8,6×10-3 .
3. = 0 (. .).
1. 2. 3. 4.
4. . j 1 2 ?
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:
1) 1 < E 2, j 1 > j 2;
2) 1 > E 2, j 1 < j 2;
3) 1 > E 2, j 1 > j 2;
4) 1 < E 2, j 1 < j 2;
5) 1 = E 2, j 1 < j 2.
5. . I II . ?
: . 2. A D. 3. B, C D. 4 A, B C. 5. A, B,C,D.
6. . , . ?
. .
. .
. .
. .
: 1) ; 2) ;
3) ; 4) , ; 5) , , .
7. ?
:
8. 1) ; 2) 1 2?
:
1. = 1 + 2. 2. 3. q =q 1= q 2. 4. q = q 1+ q 2.
5. U = U 1 + U 2, 6. U = U 1 + U 2.
9. q, S, F. ?
:
1. l S . v, n, q. ?
: qvnS. 2. qvn. 3. qvnS/l. 4. qvnS. 5. qvnl/S.
2. , . ?
:
1. . 2. - , - . 3. - , - . 4. .
3. , . 100 2 2. 0,05 . 1,43 . ... , 0,5 .
: 1. 2 ; 2. 1,2 ; 3. 1,8 ; 4. 3 ; 5. 3, 7 .
4. , 10 , 2 ?
:
1. R = 0,25 R ; 2. R = R ; 3. R = 5 R ; 4. R = 0,1 R .
5. R 1 = 360 R 2 = 240 . ?
: 1. , 1,5 ; 2. 1,5 ;
3. , 2,25 ; 4. , 2,25 ; 5. , 1,2 .
6. ? R 1 - .
:
1. I 1 (R 1+ r 1) - I 2(R 2+ r 2) = e1 - e2.
2. I 1 R 1 - I 2 R 2 = e 1 - e 2.
3. - I 1 (R 1+ r 1) - I 2(R 2+ r 2) = e1 + e2.
4. I 1 (R 1+ R 2) + I 2(r 1+ r 2) = e1 + e2
: - 1.
3.4. 3
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300. q = Ƿ10-10 . q0 , ?
301. = 10 q, 2q, 3q, 4q, 5q, 6q (q = 0,1 ). F, q, .
302. q = 40 = 10 . , .
303. q = 10-9 . q 0 , ?
304. q. q 0 = -0,287 . q, , , .
305. . q , r = 1,510-4 . ρ = 103 /3.
306. , . , R = 5,310-9 . ?
307. q = 310-7 . q 0 = 210-9 , m = 610-6 , , , , r = 10 , R < r, m<<m.
308. q 1 = 2 q 2 = 4 l = 60 . , q3, .
309. R . , +q, , ( -q) . r . (r>>R)
310. R = 10 q = 50 . φ , , .
311 l = 20 τ = 0,1 . φ , , d = 20 .
312. q = 31,4 . φ , , . R = 10 .
313. τ = 20 /. φ , , . R = 14,1 .
314. q = 0,2 . φ , , r = 20 . R = 10 .
315. τ = 20 /. φ , , . R = 10 .
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316. , , τ = 0,5 /. φ , , = 20 .
317. R = 10 q = 0,05 . φ , , .
318. R = 10 τ= 0,2 /. φ , , .
319. R = 10 τ = 1 /. φ , .
320. σ1 = -4σ, σ2 = 2σ, σ = 40 /2. 1) : , ; 2) .