Two points $P$ and $Q$ are maintained at the potentials of 10 V and $-4$ V respectively. The work done in moving 100 electrons from $P$ to $Q$ is\\
(1) $- 19 \times 10 ^ { - 17 } \mathrm {~J}$\\
(2) $9.60 \times 10 ^ { - 17 } \mathrm {~J}$\\
(3) $- 2.24 \times 10 ^ { - 16 } \mathrm {~J}$\\
(4) $2.24 \times 10 ^ { - 16 } \mathrm {~J}$