A small charged bead has a mass of \(1.0 \mathrm{~g}\). It is held in a INT uniform electric field \(\vec{E}=(200,000 \mathrm{~N} / \mathrm{C}\), up \()\). When the bead is released, it accelerates upward with an acceleration of \(20 \mathrm{~m} / \mathrm{s}^{2}\). What is the charge on the bead?