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5. ?
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9
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: , , , , .
, , :
, (1)
, ( K = 1/4p); R ; I ; x , .
, . , , . .
A (.1). n = N / L, N , L . dx dN = n × dx . I, I × dN.
.1. |
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. (2)
b -, dx, x = R ctgb.
.
,
.
| dx | (R 2 + x 2) (2), :
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, (3) b. b1 b2 , , :
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b1 = 0 b2 = p,
H = n×I. (5)
. / ( ).
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(6) (5) , , .
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L f , , L ..., . ... L .
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,
= m0 H (t) SN,
H (t) = H 0sinw t, w = 2p f, S , N .
, UL L:
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d . ,
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