, , : R1 = 10 , R2 = 15 , R3 = 25 , R4 = 50 , R5 = 5 I1 == 2 .
I3, I4, I5, U .
, . , R1 R2 . R12.
I1 = I2 =1.
, R1, ( ) R1 R2.
U1 = I1 R2 = 2 10 = 20 ,
U2 = I1 R2 = 2 15 = 30 .
:
U12 = U1+U2 = 20+30 = 50 .
, , , R1+R2, R3 R4 . :
U12 = U3 = U4 = 50 .
, :
I3= U3/R3 = 50/25 = 2 ,
I4= U4/R4 = 50/50 =1A.
, , :
I5=I1+I3+I4 = 2+2+1 = 5 .
R5:
U5 = I5 R5 = 5 5 = 25B.
:
U = U1+U3 = 25+50 == 75 .
2.6. ,
, Ri =1,2 , R2, 2= 24 . : R1 = 0,8 , R2 = 6 , R3 = 3 , R4 = R5 = 0,8 젠 ( 1.1).
, (h) ? , , R2 ?
.
, 1.1 1.3. 2.1 2.5
) , .
R2 R3, R4 R5 . :
R23=R2R3/(R2+R3)= 63/(6+3)=2 ;
R45=R4R5/(R4+R5)= 0,4 .
,
R= R1+R23+R45=0,8+2+0,4=3,2 .
) , .
, , , R2 24 .
P=U 2 / R, P2 R2, R2
R2 R3 , :
U2 =U3
R2 R3 :
I2=U2/R2=12/6=2 .
I3 =U3 / R3 = 12 / 3 = 4A.
R1 , R2 R3
I1 = I2 +I3 = 2+4 = 6.
|
|
R1 , .
I1=I=6.
) ( R)
U =I R = 63,2 =19,2 .
, :
.=I 2R=623,2=115,2 .
) , .
I = E/(R +r 0) :
E=I(R+r0)=6(3,2+1,2)=26,4 .
=ŷI=26,46=158,4 .
h=/= 115,2/158,4=0,73 (73%).
) R2 , R2 R3. , .
, .
8
( ) 12 . 120 .
, , . 1200 . , .
: 0,01 ; 119.
9
) ) S. , , , .
HL1 HL2 I ) )?
.
:
) ;
) HL1 , HL2 .
10*
() , .
, , . .
: ) R = 2R; ) R = R; ) R = 3R; ). R = 4R; ) R = R.
11*
, ? . .
1. I1 > I2.
2. I1 > I3.
3. U2 < U1.
4. I3 < I2.
5. U3 < U2 < U.
12.
U U, , ? .
13*
, , R?
. .
: 1. I1 .
2. I2 .
3. I3 .
4. U1 .
14
21 .
() . R4 , R1= 5 , R 2= 2,5 , R3 = 8 , R 4= 3 om, R 5= 3 om.
15
: R1 = 10 , R2 = 15 , R3 = 25 , R4 = 50 , R5 = 5 I1 == 2 .
I2, I4, I5 .
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|
16
200 , 50 .
, 100 , . , . .
, 150 . .
. , , .
3.1 .
( ), R = 11 S = 5 2. , W = 690 . , = 7*10 -4 .
.
= / S = 7 10-4 / (5 10-4) = 1,4 .
( 3.3.), :
͠= 1000 /.
I W=H L :
H L= 1000 2p 0,11 = 690
(, L, , L=2p R).
:
I = IW / W = 690 / 690 = 1A.
ma= / = 1,4/1000 = 1,4 10 -3 /.
= 2p 11 10-2 / 1,4 10-3 5 10-4 = 9,9 105 1/.
3.2 .
:
W = 1000, R = 10 , S = 20 2.
, di/dt = 500 /, .. 500 .
.
.
, ,
eL = -L di/dt = 4 10 -3 500 = 2 .
3.3. .
, , , B= 1,4 .
: d=4 , d=40 .
H, W, I=5 ; , L, μ.
(. .).
1,4 ., , 1000/.
IW=HL
W=HL / I=10002p0,2 / 5=251,
L = 2pR ( ).
= BS = 1,40,000314 = 0,00044 ,
S = pD2 / 4 .
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B = mm0H,
m = B / m0H = 1,4 / 4p10-71000 = 1115.
L = mm0W2S / L = 1115 4p10-72512 /2p0,2 = 70 .
17
, ?
1. ( ).
2. .
3. .
4. , .
18
( ) ( ), R = 11 S = 5 2. , W = 690 . 2000/. , , .
19
: W = 1000, R = 20 , S = 10 2.
, di/dt = 500 /, .. 500 .
4. .
, , , . , .