At some distance from a particles with the charge of 9 nC the electric field of the charge has a magnitude of 81 N/C. At what distance from the particle does electric field have a magnitude three times smaller?
Electric field created by a point charge by using the equation
where Q=`9.0xx10^(-6) C`
r=distance between charges
k (universal constant)=`9.0xx10^9 (Nm^2)/C^2`
Let harge is place at a distance of `r_1` ,so electrical field is E/3.
from (i) and (ii)