The excess number of electrons

\(\displaystyle{N}=\frac{{q}}{{e}}={3.0}\cdot\frac{{10}^{{-{6}}}}{{{1.6}\cdot{10}^{{-{19}}}}}\)

The corresponding increase in mass

\(\displaystyle{m}={\left({1.9}\cdot{10}^{{{13}}}\right)}{\left({9.11}\cdot{10}^{{-{31}}}\right)}\)

\(\displaystyle={1.7}\cdot{10}^{{-{17}}}{k}{g}\)

Since both objects carry charge of the same magnitude,N is also equal to the number of electrons lost by object B. Hence, the mass of B is reduced by the amount?

the difference in mass between the chargedobjects and state which has the greater mass

M=(M+m)-(M-m)

\(\displaystyle={2}{m}={3.4}\cdot{10}^{{-{17}}}{k}{g}\)

object A has larger mass.

\(\displaystyle{N}=\frac{{q}}{{e}}={3.0}\cdot\frac{{10}^{{-{6}}}}{{{1.6}\cdot{10}^{{-{19}}}}}\)

The corresponding increase in mass

\(\displaystyle{m}={\left({1.9}\cdot{10}^{{{13}}}\right)}{\left({9.11}\cdot{10}^{{-{31}}}\right)}\)

\(\displaystyle={1.7}\cdot{10}^{{-{17}}}{k}{g}\)

Since both objects carry charge of the same magnitude,N is also equal to the number of electrons lost by object B. Hence, the mass of B is reduced by the amount?

the difference in mass between the chargedobjects and state which has the greater mass

M=(M+m)-(M-m)

\(\displaystyle={2}{m}={3.4}\cdot{10}^{{-{17}}}{k}{g}\)

object A has larger mass.