" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
r = 2 cm = 0,02 m
F = 90 N
q =?
F = k q1 q1 1/r²
90 = 9x10^9 q² 1/4x10⁻⁴
4x10⁻¹² = q²
q = 2x10⁻⁶ C
q = 2μC