ВУЗ:
Составители:
Рубрика:
∆U
U
0
T
T
0
∆ω = U − U
0
∆
mU
2
2
= mU∆U
∆A = −
|q|U
1
r
0
2
∆B ∆B = B − B
0
U
1
∆ = −
|q|
2m
·
U
1
U
0
r
0
· (B − B
0
) r
0
=
U
0
ω
0
ω
0
=
|q|Bω
m
∆U
U
0
= −0.1
U
1
U
0
U
U
0
= tgα = 1
h
h
0
= 0.8 6
A = −
|q|u
1
r
0
2
∆B
−→
F = q[
−→
U
−→
B ] F
r
= |q|U
1
B
r
B
r
B
r
= −
1
2
r
∂B
∂Z
dA = F
Z
dZ = −
|q|U
1
r
2
dB
r =
υ
ω
=
√
2W m
eB
= 0.34
1
2
mυ
2
⊥
/B = const
m
0
υ
2
⊥
2
= |q|υ
⊥
B
Br
2
= const r = r
0
r
B
0
B
= 3.33
p = 25.5 H
0
= 1.92 · 10
6
H = 1.014 · 10
6
B
2
= (B
p
− B)
2
I
p
= 2I
T = I
2
p
/4πd
2
c
2
nk = 2 · 10
6
2.36µ
B
mU 2
∆U T
, ãäå ∆ω = U − U0. Ñîãëàñíî ∆ = mU ∆U
U0 T0 2
|q|U1 r0
è ∆A = − ∆B , ãäå ∆B = B − B0 , U1 ïîïåðå÷íàÿ
2
|q|
ìàãíèòíîé èíäóêöèè ñêîðîñòü, ìîæíî ïîëó÷èòü ∆ = − ·
2m
U1 U0 |q|Bω
r0 · (B − B0) ïðè÷åì r0 = , à ω0 = . Ñëåäîâàòåëüíî,
U0 ω0 m
∆U U1 U h
= −0.1 . Íî = tgα = 1, è çíà÷èò = 0.86. Óêà-
U0 U0 U0 h0
|q|u1 r0
çàíèå: A = − ∆B íàõîäèì èç ñëåäóþùèõ ñîîáðàæåíèé:
→
− →−
− → 2
F = q[ U B ], Fr = |q|U1 Br , ãäå Br ðàäèàëüíàÿ ñîñòàâëÿþùàÿ
1 ∂B |q|U1 r
ïîëÿ, Br = − r , dA = FZ dZ = − dB .
2 ∂Z 2
√
υ 2W m
109. r = = = 0.34 ìì.
ω eB
2
1 2 m0 υ⊥
110. mυ /B = const, ñ äðóãîé ñòîðîíû = |q|υ⊥ B è ñëåäîâà-
2 ⊥ r 2
B0
òåëüíî Br2 = const. Îòñþäà r = r0 = 3.33 ñì.
B
111. p = 25.5 àòì. H0 = 1.92 · 106 À/ì.
112. H = 1.014 · 106 À/ì.
113. 1) Äëÿ ðàâíîâåñèÿ íåîáõîäèìî, ÷òîáû ìàãíèòíîå äàâëåíèå ñ
âíóòðåííåé è âíåøíåé ïîâåðõíîñòè ïëàçìåííîãî ñëîÿ áûëî îäè-
íàêîâî. Îòñþäà B 2 = (Bp − B)2 è Ip = 2I .
2) T = Ip2 /4πd2c2 nk = 2 · 106 K.
114. 556 êÀ/ì.
115. 12.1 À/ì.
116. 0.75 Òë.
117. 101.
118. 2.36µB .
25
