289000 А = 289 кА
Объяснение:
S = ab = 0,05×0,2
Φ=BScos30°=sqrt(3)BS/2=sqrt(3)μμ0HS/2
H = 2Φ/sqrt(3)μμ0S
H = 40 × π × 10^-4/1,73 × 1× 4π × 10^-9 =
= 10^-3/1,73 × 10^-9 = 10^6/1,73 = 578000 А/м
F = Hl = 2H(a+b) = 0,5 × 578000 = 289000 А
289000 А = 289 кА
Объяснение:
S = ab = 0,05×0,2
Φ=BScos30°=sqrt(3)BS/2=sqrt(3)μμ0HS/2
H = 2Φ/sqrt(3)μμ0S
H = 40 × π × 10^-4/1,73 × 1× 4π × 10^-9 =
= 10^-3/1,73 × 10^-9 = 10^6/1,73 = 578000 А/м
F = Hl = 2H(a+b) = 0,5 × 578000 = 289000 А