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An electrom initially at rest falls ata distance of 1.5 cm in the uniform electric feild of magnitude 20000 N/c. the time taken to fall this distance........

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Net acceleration,A = (g-(eE/m)){Because of the electric field.Then apply the formula S=ut+(1/2)*A*t*t.Here u=0,S=1.5 cm,E=20000N/c,g=9.8 m/s*s,e & m are constants.Then solve for t