F=I*B*L*sinα
sinα=F/(I*B*L)=(9*10^-3)/(3*20*10^-3*0.3)=0.5
α=30
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F=I*B*L*sinα
sinα=F/(I*B*L)=(9*10^-3)/(3*20*10^-3*0.3)=0.5
α=30