, F=(1/4πε0)*2*I1I2/b, b . , , , . . √1-β2, β=v/c: F=(1/4πε0)(qQ/r2) √1-β2= =(1/4πε0)(qQ/(r2√1-β2))(1-β2)= (1/4πε0)(qQ/(r2√1-β2)) - (1/4πε0) (qQv2/(r2√1-β2)c2); . E=(1/4πε0)(Q/(r2√1-β2)), F1=qE. B=(μ0/4π)(Qv/(r2√1-β2)), μ0=1/ε0c2, : F2=qvB. , F=(μ0/4π)*2*I1I2/b μ0 . μ0=4π*10-7 . B ( ). i, . : F=qVB+qE
. -- .
B =(μ0/4π)q vr/ r3 ( ())
-: , . , dq=ρSdl, S- , dl- , ρ- . : d B = (μ0/4π)(ρSdl) v x r /r3;I= ρSv; d B = (μ0/4π)Id l x r /r3=> B =∫(μ0/4π)Id l x r /r3;
. .
: B 0: B d S=0, , . : B : B d S= μ0∑I. B=(μ0/4π)2I/b
B=μ0I/(4πR). : . (1) (2). 1) B d l= μ0I=>B2πr=μ0(Iπr2/2πR2)=>B1=μ0Ir/2πR2; 2) B d l= μ0I=>B2πr=μ0I=>B2=μ0I/2πr.
. .
: F =q[ vB ] , . max:ά=π/2;min: ά=0=>F=0.
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: F A=∫Id l x B; . F A = ∑ F F A
: dF=IBdlsinα F A .
. .
, . , :
M=∫[r,d F] M=[pm,B] (p m_|_ B)
p m= ISn . S . n , B ( ). M .
. .
. () . :1) 2) () , . . .