I1=I2=2/5=0.4
U2=I2×R2=0.4×6=2.4 В
1) F=(1/(4π*e*eo))*q²/r²
q=2*r*√(π*e*eo)=.....
3) C1+C2=4*10^-9 Ф
С3=0,5*10^-9
0.5*4/(0.5+4)=0.4*10^-9
a=3 b=5.2 r=? α=?
r=√(a²+b²)=√(3²+5.2²)=6 м
α=arctg(a/b)=arctg(0.577)=30°
=====================