r=0.1 м E=1800 Н/Кл q=?
===
E=k*q/r²
q=E*r²/k=1800*0.1²/(9*10^9)=2*10^-9 Кл (2 нКл)
=========================
r=0.1 м E=1800 Н/Кл q=?
===
E=k*q/r²
q=E*r²/k=1800*0.1²/(9*10^9)=2*10^-9 Кл (2 нКл)
=========================