Homework SourseA bead with a mass of 0055 g and a charge of 10 nC is free t
A bead with a mass of 0.055 g and a charge of 10 nC is free to slide on a vertical rod. At the base of the rod is a fixed 20 nC charge.
Part A
In equilibrium, at what height above the fixed charge does the bead rest?
A bead with a mass of 0.055 g and a charge of 10 nC is free to slide on a vertical rod. At the base of the rod is a fixed 20 nC charge.
Part A
In equilibrium, at what height above the fixed charge does the bead rest?
A bead with a mass of 0.055 g and a charge of 10 nC is free to slide on a vertical rod. At the base of the rod is a fixed 20 nC charge.
Part A
In equilibrium, at what height above the fixed charge does the bead rest?
Solution
the electric force = weight
kq1q2/r^2 = mg
9*10^9*10*10^-9*20*10^-9 / r^2 = 0.055*10^-3*9.8
r = 0.0577 m
the height above the fixed charge = 5.77 cm
