127.1

1

1 5 -

.

1.

:

r -

:

. 12V, 6 . 24V, 2

. 12V, 2 . 24V, 6

( 4)

2. V = 5 103V

L = 2cm ,

= 2 103. :

. 8nC . 4 106C

. 8C . 8 107C

( 4)

3. m = 50g y = 0,12t.

:

. 0,5J . 50J . 1J . 0,001J

( 4)

4. -

. Laplace :

. .

. .

. .

. .

( 4)

5. Oersted :

. .

. .

. .

12

6 I(A)

V (V)

(0,0)

128. 1o

. .

( 4)

6. :

.

.

.

. Ohm

. Lenz .

( 5)

2

1. -

.

. ;

( 2)

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.

( 6)

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2. -

-

. ,

;

.

( 8)

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A B

E

tt1 t2 t3 t4

0

0,60

129.1

3.

. -

-

.

.

;

( 2)

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. .

( 7)

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3

S = 5 103m2 -

L = 8,85 10-6m.

, 0

= 8,85 1012C/Nm

. ;

( 4)

. F

10-9F. -

;

( 7)

. Q = 88,5C, -

.

( 5)

. F

.

( 9)

A

B

I

V

130. 1o

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4

40V/80W, -

r = 0,5m R = 20.

-

. :

. -

.

( 8)

.

( 5)

.

( 5)

. ,

, -

.

( 7)

AB

131.1

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132. 2o

1

1. Coulomb -

1q q= + V .

1q , 2q 2q= , . .

. .

( 5)

2. r 0= - R . -

R R,

:

. . 2 . /2 . 4

( 5)

3. -

,

, .

. -

.

. -

S.

. .

. .

( 5)

4. .

. ...........................,

.

. ........................... -

.

.

...........................

. ...........................

.

.

...........................

( 5)

N S

133.2

5. , ,

, .

. E

Q,

Q.

. H

.

. .

. Lenz.

( 4)

2

1. -

. -

.

( 8)

2. -

.

( 9)

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............................................................................................................................

3. -

. -

, -

:. . /2 . 3/4 . /4

( 2)

.

( 3)

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N

S

134. 2o

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3

1R 10= 2R 40= = 153V

r 1= .. ;

( 6)

. ;

( 6)

.

;

( 6)

.

72V/648W. ;

( 7)

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135.2

EK m,q

4

m 100g=

K 640N / m= . 3q 6410 C= -

E 1000N / C= - .

. .

( 6)

. :

i. .

( 6)

ii.

( 6)

iii. .

( 7)

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136. 3o

1

1. -

. ;

.

. .

.

.

( 5)

2. C, Q

V. Q,

:

. .

. .

( 5)

3. ,

:

. .

. .

( 5)

4. 70W. -

0,7,

:

. 70W . 10W

. 49W . 77W

( 5)

5. , ,

, .

. ,

-

;

. ,

.

. ,

, .

. ,

.

.

.

( 5)

137.3

2

1. -

.

.

. :

i. ii. iii.

( 2)

. :

i. ii. iii.

( 2)

.

( 4)

2. ,

V, L,

= V/L

( 8)

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3. .

, -

;

.

( 3)

.

( 3)

.

( 3)

. ( )

( 3)

.

NS A B

138. 3o

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3

2 2S 10 m= R 0,025= . -

0,1m=

B 10T= , .

.

;

( 4)

. t 2s=

, -

.

.

( 8)

. KB

,

.

( 6)

.

0,5m

KB

. ( )7 2K 10 / = .( 7)

K

B

139.3

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140. 3o

4

R = 10.

6= .

Q 30C= C 10F= , :

.

V( 4)

.

( 6)

. , .

( 7)

. , .

.

( 8)

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+

A

B

CR

R

R

R

R

E, r

: , .

- .

- - .

- -

- - .

- .

.